[Android] Upstream ChromeBrowserProvider, the Android port ContentProvider implementation.

chrome/android/java/src/org/chromium/chrome/browser/ChromeBrowserProvider.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeBrowserProvider.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeBrowserProvider.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeBrowserProvider.java
new file mode 100644
index 0000000000000000000000000000000000000000..c8c3ee93c043ae72d82276792327e532d21ce198
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeBrowserProvider.java
@@ -0,0 +1,1309 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser;
+
+import android.app.Activity;
+import android.app.SearchManager;
+import android.content.ContentProvider;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.UriMatcher;
+import android.database.Cursor;
+import android.database.MatrixCursor;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Looper;
+import android.os.Message;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.os.Parcelable.Creator;
+import android.preference.PreferenceManager;
+import android.provider.BaseColumns;
+import android.provider.Browser;
+import android.provider.Browser.BookmarkColumns;
+import android.provider.Browser.SearchColumns;
+import android.text.TextUtils;
+import android.util.Log;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.CalledByNativeUnchecked;
+import org.chromium.base.ThreadUtils;
+import org.chromium.chrome.browser.database.SQLiteCursor;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Vector;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * This class provides various information of Chrome, like bookmarks, most
+ * visited page etc. It is used to support android.provider.Browser.
+ *
+ */
+public class ChromeBrowserProvider extends ContentProvider {
+    private static final String TAG = "ChromeBrowserProvider";
+
+    // Defines the API methods that the Client can call by name.
+    static final String CLIENT_API_BOOKMARK_NODE_EXISTS = "BOOKMARK_NODE_EXISTS";
+    static final String CLIENT_API_CREATE_BOOKMARKS_FOLDER_ONCE = "CREATE_BOOKMARKS_FOLDER_ONCE";
+    static final String CLIENT_API_GET_BOOKMARK_FOLDER_HIERARCHY = "GET_BOOKMARK_FOLDER_HIERARCHY";
+    static final String CLIENT_API_GET_BOOKMARK_NODE = "GET_BOOKMARK_NODE";
+    static final String CLIENT_API_GET_DEFAULT_BOOKMARK_FOLDER = "GET_DEFAULT_BOOKMARK_FOLDER";
+    static final String CLIENT_API_GET_MOBILE_BOOKMARKS_FOLDER_ID =
+            "GET_MOBILE_BOOKMARKS_FOLDER_ID";
+    static final String CLIENT_API_IS_BOOKMARK_IN_MOBILE_BOOKMARKS_BRANCH =
+            "IS_BOOKMARK_IN_MOBILE_BOOKMARKS_BRANCH";
+    static final String CLIENT_API_RESULT_KEY = "result";
+
+
+    // Defines Chrome's API authority, so it can be run and tested
+    // independently.
+    private static final String API_AUTHORITY_SUFFIX = ".browser";
+
+    private static final String BROWSER_CONTRACT_API_AUTHORITY =
+        "com.google.android.apps.chrome.browser-contract";
+
+    // These values are taken from android.provider.BrowserContract.java since
+    // that class is hidden from the SDK.
+    private static final String BROWSER_CONTRACT_AUTHORITY = "com.android.browser";
+    private static final String BROWSER_CONTRACT_HISTORY_CONTENT_TYPE =
+        "vnd.android.cursor.dir/browser-history";
+    private static final String BROWSER_CONTRACT_HISTORY_CONTENT_ITEM_TYPE =
+        "vnd.android.cursor.item/browser-history";
+
+    // This Authority is for internal interface. It's concatenated with
+    // Context.getPackageName() so that we can install different channels
+    // SxS and have different authorities.
+    private static final String AUTHORITY_SUFFIX = ".ChromeBrowserProvider";
+    private static final String BOOKMARKS_PATH = "bookmarks";
+    private static final String SEARCHES_PATH = "searches";
+    private static final String HISTORY_PATH = "history";
+    private static final String COMBINED_PATH = "combined";
+    private static final String BOOKMARK_FOLDER_PATH = "hierarchy";
+
+    public static final Uri BROWSER_CONTRACTS_BOOKMAKRS_API_URI = buildContentUri(
+            BROWSER_CONTRACT_API_AUTHORITY, BOOKMARKS_PATH);
+
+    public static final Uri BROWSER_CONTRACTS_SEARCHES_API_URI = buildContentUri(
+            BROWSER_CONTRACT_API_AUTHORITY, SEARCHES_PATH);
+
+    public static final Uri BROWSER_CONTRACTS_HISTORY_API_URI = buildContentUri(
+            BROWSER_CONTRACT_API_AUTHORITY, HISTORY_PATH);
+
+    public static final Uri BROWSER_CONTRACTS_COMBINED_API_URI = buildContentUri(
+            BROWSER_CONTRACT_API_AUTHORITY, COMBINED_PATH);
+
+    /** The parameter used to specify a bookmark parent ID in ContentValues. */
+    public static final String BOOKMARK_PARENT_ID_PARAM = "parentId";
+
+    /** The parameter used to specify whether this is a bookmark folder. */
+    public static final String BOOKMARK_IS_FOLDER_PARAM = "isFolder";
+
+    /** Invalid id value for the Android ContentProvider API calls. */
+    public static final long INVALID_CONTENT_PROVIDER_ID = 0;
+
+    // ID used to indicate an invalid id for bookmark nodes.
+    // Client API queries should use ChromeBrowserProviderClient.INVALID_BOOMARK_ID.
+    static final long INVALID_BOOKMARK_ID = -1;
+
+    private static final String LAST_MODIFIED_BOOKMARK_FOLDER_ID_KEY = "last_bookmark_folder_id";
+
+    private static final int URI_MATCH_BOOKMARKS = 0;
+    private static final int URI_MATCH_BOOKMARKS_ID = 1;
+    private static final int URL_MATCH_API_BOOKMARK = 2;
+    private static final int URL_MATCH_API_BOOKMARK_ID = 3;
+    private static final int URL_MATCH_API_SEARCHES = 4;
+    private static final int URL_MATCH_API_SEARCHES_ID = 5;
+    private static final int URL_MATCH_API_HISTORY_CONTENT = 6;
+    private static final int URL_MATCH_API_HISTORY_CONTENT_ID = 7;
+    private static final int URL_MATCH_API_BOOKMARK_CONTENT = 8;
+    private static final int URL_MATCH_API_BOOKMARK_CONTENT_ID = 9;
+    private static final int URL_MATCH_BOOKMARK_SUGGESTIONS_ID = 10;
+    private static final int URL_MATCH_BOOKMARK_HISTORY_SUGGESTIONS_ID = 11;
+
+    // TODO : Using Android.provider.Browser.HISTORY_PROJECTION once THUMBNAIL,
+    // TOUCH_ICON, and USER_ENTERED fields are supported.
+    private static final String[] BOOKMARK_DEFAULT_PROJECTION = new String[] {
+            BookmarkColumns._ID, BookmarkColumns.URL, BookmarkColumns.VISITS,
+            BookmarkColumns.DATE, BookmarkColumns.BOOKMARK, BookmarkColumns.TITLE,
+            BookmarkColumns.FAVICON, BookmarkColumns.CREATED};
+
+    private static final String[] SUGGEST_PROJECTION = new String[] {
+        BookmarkColumns._ID,
+        BookmarkColumns.TITLE,
+        BookmarkColumns.URL,
+        BookmarkColumns.DATE,
+        BookmarkColumns.BOOKMARK
+    };
+
+    private final Object mInitializeUriMatcherLock = new Object();
+    private final Object mLoadNativeLock = new Object();
+    private UriMatcher mUriMatcher;
+    private long mLastModifiedBookmarkFolderId = INVALID_BOOKMARK_ID;
+    private int mNativeChromeBrowserProvider;
+    private BookmarkNode mMobileBookmarksFolder;
+
+    synchronized private void ensureUriMatcherInitialized() {
+        synchronized (mInitializeUriMatcherLock) {
+            if (mUriMatcher != null) return;
+
+            mUriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+            // The internal URIs
+            String authority = getContext().getPackageName() + AUTHORITY_SUFFIX;
+            mUriMatcher.addURI(authority, BOOKMARKS_PATH, URI_MATCH_BOOKMARKS);
+            mUriMatcher.addURI(authority, BOOKMARKS_PATH + "/#", URI_MATCH_BOOKMARKS_ID);
+            // The internal authority for public APIs
+            String apiAuthority = getContext().getPackageName() + API_AUTHORITY_SUFFIX;
+            mUriMatcher.addURI(apiAuthority, BOOKMARKS_PATH, URL_MATCH_API_BOOKMARK);
+            mUriMatcher.addURI(apiAuthority, BOOKMARKS_PATH + "/#", URL_MATCH_API_BOOKMARK_ID);
+            mUriMatcher.addURI(apiAuthority, SEARCHES_PATH, URL_MATCH_API_SEARCHES);
+            mUriMatcher.addURI(apiAuthority, SEARCHES_PATH + "/#", URL_MATCH_API_SEARCHES_ID);
+            mUriMatcher.addURI(apiAuthority, HISTORY_PATH, URL_MATCH_API_HISTORY_CONTENT);
+            mUriMatcher.addURI(apiAuthority, HISTORY_PATH + "/#", URL_MATCH_API_HISTORY_CONTENT_ID);
+            mUriMatcher.addURI(apiAuthority, COMBINED_PATH, URL_MATCH_API_BOOKMARK);
+            mUriMatcher.addURI(apiAuthority, COMBINED_PATH + "/#", URL_MATCH_API_BOOKMARK_ID);
+            // The internal authority for BrowserContracts
+            mUriMatcher.addURI(BROWSER_CONTRACT_API_AUTHORITY, HISTORY_PATH,
+                               URL_MATCH_API_HISTORY_CONTENT);
+            mUriMatcher.addURI(BROWSER_CONTRACT_API_AUTHORITY, HISTORY_PATH + "/#",
+                               URL_MATCH_API_HISTORY_CONTENT_ID);
+            mUriMatcher.addURI(BROWSER_CONTRACT_API_AUTHORITY, COMBINED_PATH,
+                               URL_MATCH_API_BOOKMARK);
+            mUriMatcher.addURI(BROWSER_CONTRACT_API_AUTHORITY, COMBINED_PATH + "/#",
+                               URL_MATCH_API_BOOKMARK_ID);
+            mUriMatcher.addURI(BROWSER_CONTRACT_API_AUTHORITY, SEARCHES_PATH,
+                               URL_MATCH_API_SEARCHES);
+            mUriMatcher.addURI(BROWSER_CONTRACT_API_AUTHORITY, SEARCHES_PATH + "/#",
+                               URL_MATCH_API_SEARCHES_ID);
+            mUriMatcher.addURI(BROWSER_CONTRACT_API_AUTHORITY, BOOKMARKS_PATH,
+                               URL_MATCH_API_BOOKMARK_CONTENT);
+            mUriMatcher.addURI(BROWSER_CONTRACT_API_AUTHORITY, BOOKMARKS_PATH + "/#",
+                               URL_MATCH_API_BOOKMARK_CONTENT_ID);
+            // Added the Android Framework URIs, so the provider can easily switched
+            // by adding 'browser' and 'com.android.browser' in manifest.
+            // The Android's BrowserContract
+            mUriMatcher.addURI(BROWSER_CONTRACT_AUTHORITY, HISTORY_PATH,
+                               URL_MATCH_API_HISTORY_CONTENT);
+            mUriMatcher.addURI(BROWSER_CONTRACT_AUTHORITY, HISTORY_PATH + "/#",
+                               URL_MATCH_API_HISTORY_CONTENT_ID);
+            mUriMatcher.addURI(BROWSER_CONTRACT_AUTHORITY, "combined", URL_MATCH_API_BOOKMARK);
+            mUriMatcher.addURI(BROWSER_CONTRACT_AUTHORITY, "combined/#", URL_MATCH_API_BOOKMARK_ID);
+            mUriMatcher.addURI(BROWSER_CONTRACT_AUTHORITY, SEARCHES_PATH, URL_MATCH_API_SEARCHES);
+            mUriMatcher.addURI(BROWSER_CONTRACT_AUTHORITY, SEARCHES_PATH + "/#",
+                               URL_MATCH_API_SEARCHES_ID);
+            mUriMatcher.addURI(BROWSER_CONTRACT_AUTHORITY, BOOKMARKS_PATH,
+                               URL_MATCH_API_BOOKMARK_CONTENT);
+            mUriMatcher.addURI(BROWSER_CONTRACT_AUTHORITY, BOOKMARKS_PATH + "/#",
+                               URL_MATCH_API_BOOKMARK_CONTENT_ID);
+            // For supporting android.provider.browser.BookmarkColumns and
+            // SearchColumns
+            mUriMatcher.addURI("browser", BOOKMARKS_PATH, URL_MATCH_API_BOOKMARK);
+            mUriMatcher.addURI("browser", BOOKMARKS_PATH + "/#", URL_MATCH_API_BOOKMARK_ID);
+            mUriMatcher.addURI("browser", SEARCHES_PATH, URL_MATCH_API_SEARCHES);
+            mUriMatcher.addURI("browser", SEARCHES_PATH + "/#", URL_MATCH_API_SEARCHES_ID);
+
+            mUriMatcher.addURI(apiAuthority,
+                               BOOKMARKS_PATH + "/" + SearchManager.SUGGEST_URI_PATH_QUERY,
+                               URL_MATCH_BOOKMARK_SUGGESTIONS_ID);
+            mUriMatcher.addURI(apiAuthority,
+                               SearchManager.SUGGEST_URI_PATH_QUERY,
+                               URL_MATCH_BOOKMARK_HISTORY_SUGGESTIONS_ID);
+        }
+    }
+
+    @Override
+    public boolean onCreate() {
+        SharedPreferences sharedPreferences =
+                PreferenceManager.getDefaultSharedPreferences(getContext());
+        mLastModifiedBookmarkFolderId = sharedPreferences.getLong(
+                LAST_MODIFIED_BOOKMARK_FOLDER_ID_KEY, INVALID_BOOKMARK_ID);
+        return true;
+    }
+
+    private String buildSuggestWhere(String selection, int argc) {
+        StringBuilder sb = new StringBuilder(selection);
+        for (int i = 0; i < argc - 1; i++) {
+            sb.append(" OR ");
+            sb.append(selection);
+        }
+        return sb.toString();
+    }
+
+    private Cursor getBookmarkHistorySuggestions(String selection, String[] selectionArgs,
+            String sortOrder, boolean excludeHistory) {
+        boolean matchTitles = false;
+        Vector<String> args = new Vector();
+        String like = selectionArgs[0] + "%";
+        if (selectionArgs[0].startsWith("http") || selectionArgs[0].startsWith("file")) {
+            args.add(like);
+        } else {
+            // Match against common URL prefixes.
+            args.add("http://" + like);
+            args.add("https://" + like);
+            args.add("http://www." + like);
+            args.add("https://www." + like);
+            args.add("file://" + like);
+            matchTitles = true;
+        }
+
+        StringBuilder urlWhere = new StringBuilder("(");
+        urlWhere.append(buildSuggestWhere(selection, args.size()));
+        if (matchTitles) {
+            args.add(like);
+            urlWhere.append(" OR title LIKE ?");
+        }
+        urlWhere.append(")");
+
+        if (excludeHistory) {
+            urlWhere.append(" AND bookmark=?");
+            args.add("1");
+        }
+
+        selectionArgs = args.toArray(selectionArgs);
+        Cursor cursor = queryBookmarkFromAPI(SUGGEST_PROJECTION, urlWhere.toString(),
+                selectionArgs, sortOrder);
+        return new ChromeBrowserProviderSuggestionsCursor(cursor);
+    }
+
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+            String sortOrder) {
+        // We can not run in UI thread, do nothing for the official release.
+        if (isInUiThread()) return null;
+        if (!ensureNativeChromeLoaded()) return null;
+
+        // Check for invalid id values if provided.
+        // If it represents a bookmark node then it's the root node. Don't provide access here.
+        // Otherwise it represents a SQLite row id, so 0 is invalid.
+        long bookmarkId = INVALID_CONTENT_PROVIDER_ID;
+        try {
+            bookmarkId = ContentUris.parseId(uri);
+            if (bookmarkId == INVALID_CONTENT_PROVIDER_ID) return null;
+        } catch (Exception e) {
+        }
+
+        int match = mUriMatcher.match(uri);
+        Cursor cursor = null;
+        switch (match) {
+            case URL_MATCH_BOOKMARK_SUGGESTIONS_ID:
+                cursor = getBookmarkHistorySuggestions(selection, selectionArgs, sortOrder, true);
+                break;
+            case URL_MATCH_BOOKMARK_HISTORY_SUGGESTIONS_ID:
+                cursor = getBookmarkHistorySuggestions(selection, selectionArgs, sortOrder, false);
+                break;
+            case URL_MATCH_API_BOOKMARK:
+                cursor = queryBookmarkFromAPI(projection, selection, selectionArgs, sortOrder);
+                break;
+            case URL_MATCH_API_BOOKMARK_ID:
+                cursor = queryBookmarkFromAPI(projection, buildWhereClause(bookmarkId, selection),
+                        selectionArgs, sortOrder);
+                break;
+            case URL_MATCH_API_SEARCHES:
+                cursor = querySearchTermFromAPI(projection, selection, selectionArgs, sortOrder);
+                break;
+            case URL_MATCH_API_SEARCHES_ID:
+                cursor = querySearchTermFromAPI(projection, buildWhereClause(bookmarkId, selection),
+                        selectionArgs, sortOrder);
+                break;
+            case URL_MATCH_API_HISTORY_CONTENT:
+                cursor = queryBookmarkFromAPI(projection, buildHistoryWhereClause(selection),
+                        selectionArgs, sortOrder);
+                break;
+            case URL_MATCH_API_HISTORY_CONTENT_ID:
+                cursor = queryBookmarkFromAPI(projection,
+                        buildHistoryWhereClause(bookmarkId, selection), selectionArgs, sortOrder);
+                break;
+            case URL_MATCH_API_BOOKMARK_CONTENT:
+                cursor = queryBookmarkFromAPI(projection, buildBookmarkWhereClause(selection),
+                        selectionArgs, sortOrder);
+                break;
+            case URL_MATCH_API_BOOKMARK_CONTENT_ID:
+                cursor = queryBookmarkFromAPI(projection,
+                        buildBookmarkWhereClause(bookmarkId, selection), selectionArgs, sortOrder);
+                break;
+            default:
+                throw new IllegalArgumentException(TAG + ": query - unknown URL uri = " + uri);
+        }
+        if (cursor == null) {
+            cursor = new MatrixCursor(new String[] { });
+        }
+        cursor.setNotificationUri(getContext().getContentResolver(), uri);
+        return cursor;
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues values) {
+        // We can not run in UI thread, do nothing for the official release.
+        if (isInUiThread()) return null;
+        if (!ensureNativeChromeLoaded()) return null;
+
+        int match = mUriMatcher.match(uri);
+        Uri res = null;
+        long id;
+        switch (match) {
+            case URI_MATCH_BOOKMARKS:
+                id = addBookmark(values);
+                if (id == INVALID_BOOKMARK_ID) return null;
+                break;
+            case URL_MATCH_API_BOOKMARK_CONTENT:
+                values.put(BookmarkColumns.BOOKMARK, 1);
+                //$FALL-THROUGH$
+            case URL_MATCH_API_BOOKMARK:
+            case URL_MATCH_API_HISTORY_CONTENT:
+                id = addBookmarkFromAPI(values);
+                if (id == INVALID_CONTENT_PROVIDER_ID) return null;
+                break;
+            case URL_MATCH_API_SEARCHES:
+                id = addSearchTermFromAPI(values);
+                if (id == INVALID_CONTENT_PROVIDER_ID) return null;
+                break;
+            default:
+                throw new IllegalArgumentException(TAG + ": insert - unknown URL " + uri);
+        }
+
+        res = ContentUris.withAppendedId(uri, id);
+        getContext().getContentResolver().notifyChange(res, null);
+        return res;
+    }
+
+    @Override
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        // We can not run in UI thread, do nothing for the official release.
+        if (isInUiThread()) return 0;
+        if (!ensureNativeChromeLoaded()) return 0;
+
+        // Check for invalid id values if provided.
+        // If it represents a bookmark node then it's the root node and not mutable.
+        // Otherwise it represents a SQLite row id, so 0 is invalid.
+        long bookmarkId = INVALID_CONTENT_PROVIDER_ID;
+        try {
+            bookmarkId = ContentUris.parseId(uri);
+            if (bookmarkId == INVALID_CONTENT_PROVIDER_ID) return 0;
+        } catch (Exception e) {
+        }
+
+        int match = mUriMatcher.match(uri);
+        int result;
+        switch (match) {
+            case URI_MATCH_BOOKMARKS_ID :
+                result = nativeRemoveBookmark(mNativeChromeBrowserProvider, bookmarkId);
+                break;
+            case URL_MATCH_API_BOOKMARK_ID:
+                result = removeBookmarkFromAPI(
+                        buildWhereClause(bookmarkId, selection), selectionArgs);
+                break;
+            case URL_MATCH_API_BOOKMARK:
+                result = removeBookmarkFromAPI(selection, selectionArgs);
+                break;
+            case URL_MATCH_API_SEARCHES_ID:
+                result = removeSearchFromAPI(buildWhereClause(bookmarkId, selection),
+                        selectionArgs);
+                break;
+            case URL_MATCH_API_SEARCHES:
+                result = removeSearchFromAPI(selection, selectionArgs);
+                break;
+            case URL_MATCH_API_HISTORY_CONTENT:
+                result = removeHistoryFromAPI(selection, selectionArgs);
+                break;
+            case URL_MATCH_API_HISTORY_CONTENT_ID:
+                result = removeHistoryFromAPI(buildWhereClause(bookmarkId, selection),
+                        selectionArgs);
+                break;
+            case URL_MATCH_API_BOOKMARK_CONTENT:
+                result = removeBookmarkFromAPI(buildBookmarkWhereClause(selection), selectionArgs);
+                break;
+            case URL_MATCH_API_BOOKMARK_CONTENT_ID:
+                result = removeBookmarkFromAPI(buildBookmarkWhereClause(bookmarkId, selection),
+                        selectionArgs);
+                break;
+            default:
+                throw new IllegalArgumentException(TAG + ": delete - unknown URL " + uri);
+        }
+        if (result != 0) {
+            getContext().getContentResolver().notifyChange(uri, null);
+        }
+        return result;
+    }
+
+    @Override
+    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+        // We can not run in UI thread, do nothing for the official release.
+        if (isInUiThread()) return 0;
+        if (!ensureNativeChromeLoaded()) return 0;
+
+        // Check for invalid id values if provided.
+        // If it represents a bookmark node then it's the root node and not mutable.
+        // Otherwise it represents a SQLite row id, so 0 is invalid.
+        long bookmarkId = INVALID_CONTENT_PROVIDER_ID;
+        try {
+            bookmarkId = ContentUris.parseId(uri);
+            if (bookmarkId == INVALID_CONTENT_PROVIDER_ID) return 0;
+        } catch (Exception e) {
+        }
+
+        int match = mUriMatcher.match(uri);
+        int result;
+        switch (match) {
+            case URI_MATCH_BOOKMARKS_ID:
+                String url = null;
+                if (values.containsKey(Browser.BookmarkColumns.URL)) {
+                    url = values.getAsString(Browser.BookmarkColumns.URL);
+                }
+                String title = values.getAsString(Browser.BookmarkColumns.TITLE);
+                long parentId = INVALID_BOOKMARK_ID;
+                if (values.containsKey(BOOKMARK_PARENT_ID_PARAM)) {
+                    parentId = values.getAsLong(BOOKMARK_PARENT_ID_PARAM);
+                }
+                result = nativeUpdateBookmark(mNativeChromeBrowserProvider, bookmarkId, url, title,
+                        parentId);
+                updateLastModifiedBookmarkFolder(parentId);
+                break;
+            case URL_MATCH_API_BOOKMARK_ID:
+                result = updateBookmarkFromAPI(values, buildWhereClause(bookmarkId, selection),
+                        selectionArgs);
+                break;
+            case URL_MATCH_API_BOOKMARK:
+                result = updateBookmarkFromAPI(values, selection, selectionArgs);
+                break;
+            case URL_MATCH_API_SEARCHES_ID:
+                result = updateSearchTermFromAPI(values, buildWhereClause(bookmarkId, selection),
+                        selectionArgs);
+                break;
+            case URL_MATCH_API_SEARCHES:
+                result = updateSearchTermFromAPI(values, selection, selectionArgs);
+                break;
+            case URL_MATCH_API_HISTORY_CONTENT:
+                result = updateBookmarkFromAPI(values, buildHistoryWhereClause(selection),
+                        selectionArgs);
+                break;
+            case URL_MATCH_API_HISTORY_CONTENT_ID:
+                result = updateBookmarkFromAPI(values,
+                        buildHistoryWhereClause(bookmarkId, selection), selectionArgs);
+                break;
+            case URL_MATCH_API_BOOKMARK_CONTENT:
+                result = updateBookmarkFromAPI(values, buildBookmarkWhereClause(selection),
+                        selectionArgs);
+                break;
+            case URL_MATCH_API_BOOKMARK_CONTENT_ID:
+                result = updateBookmarkFromAPI(values,
+                        buildBookmarkWhereClause(bookmarkId, selection), selectionArgs);
+                break;
+            default:
+                throw new IllegalArgumentException(TAG + ": update - unknown URL " + uri);
+        }
+        if (result != 0) {
+            getContext().getContentResolver().notifyChange(uri, null);
+        }
+        return result;
+    }
+
+    @Override
+    public String getType(Uri uri) {
+        ensureUriMatcherInitialized();
+        int match = mUriMatcher.match(uri);
+        switch (match) {
+            case URI_MATCH_BOOKMARKS:
+            case URL_MATCH_API_BOOKMARK:
+                return "vnd.android.cursor.dir/bookmark";
+            case URI_MATCH_BOOKMARKS_ID:
+            case URL_MATCH_API_BOOKMARK_ID:
+                return "vnd.android.cursor.item/bookmark";
+            case URL_MATCH_API_SEARCHES:
+                return "vnd.android.cursor.dir/searches";
+            case URL_MATCH_API_SEARCHES_ID:
+                return "vnd.android.cursor.item/searches";
+            case URL_MATCH_API_HISTORY_CONTENT:
+                return BROWSER_CONTRACT_HISTORY_CONTENT_TYPE;
+            case URL_MATCH_API_HISTORY_CONTENT_ID:
+                return BROWSER_CONTRACT_HISTORY_CONTENT_ITEM_TYPE;
+            default:
+                throw new IllegalArgumentException(TAG + ": getType - unknown URL " + uri);
+        }
+    }
+
+    private long addBookmark(ContentValues values) {
+        String url = values.getAsString(Browser.BookmarkColumns.URL);
+        String title = values.getAsString(Browser.BookmarkColumns.TITLE);
+        boolean isFolder = false;
+        if (values.containsKey(BOOKMARK_IS_FOLDER_PARAM)) {
+            isFolder = values.getAsBoolean(BOOKMARK_IS_FOLDER_PARAM);
+        }
+        long parentId = INVALID_BOOKMARK_ID;
+        if (values.containsKey(BOOKMARK_PARENT_ID_PARAM)) {
+            parentId = values.getAsLong(BOOKMARK_PARENT_ID_PARAM);
+        }
+        long id = nativeAddBookmark(mNativeChromeBrowserProvider, url, title, isFolder, parentId);
+        if (id == INVALID_BOOKMARK_ID) return id;
+
+        if (isFolder) {
+            updateLastModifiedBookmarkFolder(id);
+        } else {
+            updateLastModifiedBookmarkFolder(parentId);
+        }
+        return id;
+    }
+
+    private void updateLastModifiedBookmarkFolder(long id) {
+        if (mLastModifiedBookmarkFolderId == id) return;
+
+        mLastModifiedBookmarkFolderId = id;
+        SharedPreferences sharedPreferences =
+                PreferenceManager.getDefaultSharedPreferences(getContext());
+        sharedPreferences.edit()
+                .putLong(LAST_MODIFIED_BOOKMARK_FOLDER_ID_KEY, mLastModifiedBookmarkFolderId)
+                .apply();
+    }
+
+    public static String getApiAuthority(Context context) {
+        return context.getPackageName() + API_AUTHORITY_SUFFIX;
+    }
+
+    public static String getInternalAuthority(Context context) {
+        return context.getPackageName() + AUTHORITY_SUFFIX;
+    }
+
+    public static Uri getBookmarksUri(Context context) {
+        return buildContentUri(getInternalAuthority(context), BOOKMARKS_PATH);
+    }
+
+    public static Uri getBookmarkFolderUri(Context context) {
+        return buildContentUri(getInternalAuthority(context), BOOKMARK_FOLDER_PATH);
+    }
+
+    public static Uri getBookmarksApiUri(Context context) {
+        return buildContentUri(getApiAuthority(context), BOOKMARKS_PATH);
+    }
+
+    public static Uri getSearchesApiUri(Context context) {
+        return buildContentUri(getApiAuthority(context), SEARCHES_PATH);
+    }
+
+    private boolean bookmarkNodeExists(long nodeId) {
+        if (nodeId < 0) return false;
+        return nativeBookmarkNodeExists(mNativeChromeBrowserProvider, nodeId);
+    }
+
+    private long createBookmarksFolderOnce(String title, long parentId) {
+        return nativeCreateBookmarksFolderOnce(mNativeChromeBrowserProvider, title, parentId);
+    }
+
+    private BookmarkNode getBookmarkFolderHierarchy() {
+        return nativeGetAllBookmarkFolders(mNativeChromeBrowserProvider);
+    }
+
+    protected BookmarkNode getBookmarkNode(long nodeId, boolean getParent, boolean getChildren,
+            boolean getFavicons, boolean getThumbnails) {
+        BookmarkNode node = nativeGetBookmarkNode(mNativeChromeBrowserProvider, nodeId, getParent,
+                getChildren);
+        if (!getFavicons && !getThumbnails) return node;
+
+        // Favicons and thumbnails need to be populated separately as they are provided
+        // asynchronously by Chromium services other than the bookmark model.
+        if (node.parent() != null) populateNodeImages(node.parent(), getFavicons, getThumbnails);
+        for (BookmarkNode child : node.children()) {
+            populateNodeImages(child, getFavicons, getThumbnails);
+        }
+
+        return node;
+    }
+
+    private BookmarkNode getDefaultBookmarkFolder() {
+        // Try to access the bookmark folder last modified by us. If it doesn't exist anymore
+        // then use the synced node (Mobile Bookmarks).
+        BookmarkNode lastModified = getBookmarkNode(mLastModifiedBookmarkFolderId, false, false,
+                false, false);
+        if (lastModified == null) {
+            lastModified = getMobileBookmarksFolder();
+            mLastModifiedBookmarkFolderId = lastModified != null ? lastModified.id() :
+                    INVALID_BOOKMARK_ID;
+        }
+        return lastModified;
+    }
+
+    private void populateNodeImages(BookmarkNode node, boolean favicon, boolean thumbnail) {
+        if (node == null || node.type() != Type.URL) return;
+
+        if (favicon) {
+            node.setFavicon(nativeGetFaviconOrTouchIcon(mNativeChromeBrowserProvider, node.url()));
+        }
+
+        if (thumbnail) {
+            node.setThumbnail(nativeGetThumbnail(mNativeChromeBrowserProvider, node.url()));
+        }
+    }
+
+    private BookmarkNode getMobileBookmarksFolder() {
+        if (mMobileBookmarksFolder == null) {
+            mMobileBookmarksFolder = nativeGetMobileBookmarksFolder(mNativeChromeBrowserProvider);
+        }
+        return mMobileBookmarksFolder;
+    }
+
+    protected long getMobileBookmarksFolderId() {
+        BookmarkNode mobileBookmarks = getMobileBookmarksFolder();
+        return mobileBookmarks != null ? mobileBookmarks.id() : INVALID_BOOKMARK_ID;
+    }
+
+    private boolean isBookmarkInMobileBookmarksBranch(long nodeId) {
+        if (nodeId <= 0) return false;
+        return nativeIsBookmarkInMobileBookmarksBranch(mNativeChromeBrowserProvider, nodeId);
+    }
+
+    static String argKey(int i) {
+        return "arg" + i;
+    }
+
+    @Override
+    public Bundle call(String method, String arg, Bundle extras) {
+        if (isInUiThread()) return null;
+        if (!ensureNativeChromeLoaded()) return null;
+        if (method == null || extras == null) return null;
+
+        Bundle result = new Bundle();
+        if (CLIENT_API_BOOKMARK_NODE_EXISTS.equals(method)) {
+            result.putBoolean(CLIENT_API_RESULT_KEY,
+                    bookmarkNodeExists(extras.getLong(argKey(0))));
+        } else if (CLIENT_API_CREATE_BOOKMARKS_FOLDER_ONCE.equals(method)) {
+            result.putLong(CLIENT_API_RESULT_KEY,
+                    createBookmarksFolderOnce(extras.getString(argKey(0)),
+                                              extras.getLong(argKey(1))));
+        } else if (CLIENT_API_GET_BOOKMARK_FOLDER_HIERARCHY.equals(method)) {
+            result.putParcelable(CLIENT_API_RESULT_KEY, getBookmarkFolderHierarchy());
+        } else if (CLIENT_API_GET_BOOKMARK_NODE.equals(method)) {
+            result.putParcelable(CLIENT_API_RESULT_KEY,
+                    getBookmarkNode(extras.getLong(argKey(0)),
+                                    extras.getBoolean(argKey(1)),
+                                    extras.getBoolean(argKey(2)),
+                                    extras.getBoolean(argKey(3)),
+                                    extras.getBoolean(argKey(4))));
+        } else if (CLIENT_API_GET_DEFAULT_BOOKMARK_FOLDER.equals(method)) {
+            result.putParcelable(CLIENT_API_RESULT_KEY, getDefaultBookmarkFolder());
+        } else if (method.equals(CLIENT_API_GET_MOBILE_BOOKMARKS_FOLDER_ID)) {
+            result.putLong(CLIENT_API_RESULT_KEY, getMobileBookmarksFolderId());
+        } else if (CLIENT_API_IS_BOOKMARK_IN_MOBILE_BOOKMARKS_BRANCH.equals(method)) {
+            result.putBoolean(CLIENT_API_RESULT_KEY,
+                    isBookmarkInMobileBookmarksBranch(extras.getLong(argKey(0))));
+        } else {
+            Log.w(TAG, "Received invalid method " + method);
+            return null;
+        }
+
+        return result;
+    }
+
+    /**
+     * The type of a BookmarkNode.
+     */
+    public enum Type {
+        URL,
+        FOLDER,
+        BOOKMARK_BAR,
+        OTHER_NODE,
+        MOBILE
+    }
+
+    /**
+     * Simple Data Object representing the chrome bookmark node.
+     */
+    public static class BookmarkNode implements Parcelable {
+        private final long mId;
+        private final String mName;
+        private final String mUrl;
+        private final Type mType;
+        private final BookmarkNode mParent;
+        private final List<BookmarkNode> mChildren = new ArrayList<BookmarkNode>();
+
+        // Favicon and thumbnail optionally set in a 2-step procedure.
+        private byte[] mFavicon;
+        private byte[] mThumbnail;
+
+        /** Used to pass structured data back from the native code. */
+        // TODO(leandrogracia): remove public when VisibleForTesting works.
+        // @VisibleForTesting
+        public BookmarkNode(long id, Type type, String name, String url, BookmarkNode parent) {
+            mId = id;
+            mName = name;
+            mUrl = url;
+            mType = type;
+            mParent = parent;
+        }
+
+        /**
+         * @return The id of this bookmark entry.
+         */
+        public long id() {
+            return mId;
+        }
+
+        /**
+         * @return The name of this bookmark entry.
+         */
+        public String name() {
+            return mName;
+        }
+
+        /**
+         * @return The URL of this bookmark entry.
+         */
+        public String url() {
+            return mUrl;
+        }
+
+        /**
+         * @return The type of this bookmark entry.
+         */
+        public Type type() {
+            return mType;
+        }
+
+        /**
+         * @return The bookmark favicon, if any.
+         */
+        public byte[] favicon() {
+            return mFavicon;
+        }
+
+        /**
+         * @return The bookmark thumbnail, if any.
+         */
+        public byte[] thumbnail() {
+            return mThumbnail;
+        }
+
+        /**
+         * @return The parent folder of this bookmark entry.
+         */
+        public BookmarkNode parent() {
+            return mParent;
+        }
+
+        /**
+         * Adds a child to this node.
+         *
+         * <p>
+         * Used solely by the native code.
+         */
+        // TODO(leandrogracia): remove public when VisibleForTesting works.
+        // @VisibleForTesting
+        @CalledByNativeUnchecked("BookmarkNode")
+        public void addChild(BookmarkNode child) {
+            mChildren.add(child);
+        }
+
+        /**
+         * @return The child bookmark nodes of this node.
+         */
+        public List<BookmarkNode> children() {
+            return mChildren;
+        }
+
+        /**
+         * @return Whether this node represents a bookmarked URL or not.
+         */
+        public boolean isUrl() {
+            return mUrl != null;
+        }
+
+        /**
+         * @return true if the two individual nodes contain the same information.
+         * The existence of parent and children nodes is checked, but their contents are not.
+         */
+        public boolean equalContents(BookmarkNode node) {
+            return node != null &&
+                    mId == node.mId &&
+                    !(mName == null ^ node.mName == null) &&
+                    (mName == null || mName.equals(node.mName)) &&
+                    !(mUrl == null ^ node.mUrl == null) &&
+                    (mUrl == null || mUrl.equals(node.mUrl)) &&
+                    mType == node.mType &&
+                    byteArrayEqual(mFavicon, node.mFavicon) &&
+                    byteArrayEqual(mThumbnail, node.mThumbnail) &&
+                    !(mParent == null ^ node.mParent == null) &&
+                    children().size() == node.children().size();
+        }
+
+        private static boolean byteArrayEqual(byte[] byte1, byte[] byte2) {
+            if (byte1 == null && byte2 != null) return byte2.length == 0;
+            if (byte2 == null && byte1 != null) return byte1.length == 0;
+            return Arrays.equals(byte1, byte2);
+        }
+
+        @CalledByNative("BookmarkNode")
+        private static BookmarkNode create(
+                long id, int type, String name, String url, BookmarkNode parent) {
+            return new BookmarkNode(id, Type.values()[type], name, url, parent);
+        }
+
+        // TODO(leandrogracia): remove public when VisibleForTesting works.
+        // @VisibleForTesting
+        public void setFavicon(byte[] favicon) {
+            mFavicon = favicon;
+        }
+
+        // TODO(leandrogracia): remove public when VisibleForTesting works.
+        // @VisibleForTesting
+        public void setThumbnail(byte[] thumbnail) {
+            mThumbnail = thumbnail;
+        }
+
+        @Override
+        public int describeContents() {
+            return 0;
+        }
+
+        @Override
+        public void writeToParcel(Parcel dest, int flags) {
+            // Write the current node id.
+            dest.writeLong(mId);
+
+            // Serialize the full hierarchy from the root.
+            getHierarchyRoot().writeNodeContentsRecursive(dest);
+        }
+
+        // TODO(leandrogracia): remove public when VisibleForTesting works.
+        // @VisibleForTesting
+        public BookmarkNode getHierarchyRoot() {
+            BookmarkNode root = this;
+            while (root.parent() != null) {
+                root = root.parent();
+            }
+            return root;
+        }
+
+        private void writeNodeContentsRecursive(Parcel dest) {
+            writeNodeContents(dest);
+            dest.writeInt(mChildren.size());
+            for (BookmarkNode child : mChildren) {
+                child.writeNodeContentsRecursive(dest);
+            }
+        }
+
+        private void writeNodeContents(Parcel dest) {
+            dest.writeLong(mId);
+            dest.writeString(mName);
+            dest.writeString(mUrl);
+            dest.writeInt(mType.ordinal());
+            dest.writeByteArray(mFavicon);
+            dest.writeByteArray(mThumbnail);
+            dest.writeLong(mParent != null ? mParent.mId : INVALID_BOOKMARK_ID);
+        }
+
+        public static final Creator<BookmarkNode> CREATOR = new Creator<BookmarkNode>() {
+            private HashMap<Long, BookmarkNode> mNodeMap;
+
+            @Override
+            public BookmarkNode createFromParcel(Parcel source) {
+                mNodeMap = new HashMap<Long, BookmarkNode>();
+                long currentNodeId = source.readLong();
+                readNodeContentsRecursive(source);
+                BookmarkNode node = getNode(currentNodeId);
+                mNodeMap.clear();
+                return node;
+            }
+
+            @Override
+            public BookmarkNode[] newArray(int size) {
+                return new BookmarkNode[size];
+            }
+
+            private BookmarkNode getNode(long id) {
+                if (id == INVALID_BOOKMARK_ID) return null;
+                Long nodeId = Long.valueOf(id);
+                if (!mNodeMap.containsKey(nodeId)) {
+                    Log.e(TAG, "Invalid BookmarkNode hierarchy. Unknown id " + id);
+                    return null;
+                }
+                return mNodeMap.get(nodeId);
+            }
+
+            private BookmarkNode readNodeContents(Parcel source) {
+                long id = source.readLong();
+                String name = source.readString();
+                String url = source.readString();
+                int type = source.readInt();
+                byte[] favicon = source.createByteArray();
+                byte[] thumbnail = source.createByteArray();
+                long parentId = source.readLong();
+                if (type < 0 || type >= Type.values().length) {
+                    Log.w(TAG, "Invalid node type ordinal value.");
+                    return null;
+                }
+
+                BookmarkNode node = new BookmarkNode(id, Type.values()[type], name, url,
+                        getNode(parentId));
+                node.setFavicon(favicon);
+                node.setThumbnail(thumbnail);
+                return node;
+            }
+
+            private BookmarkNode readNodeContentsRecursive(Parcel source) {
+                BookmarkNode node = readNodeContents(source);
+                if (node == null) return null;
+
+                Long nodeId = Long.valueOf(node.id());
+                if (mNodeMap.containsKey(nodeId)) {
+                    Log.e(TAG, "Invalid BookmarkNode hierarchy. Duplicate id " + node.id());
+                    return null;
+                }
+                mNodeMap.put(nodeId, node);
+
+                int numChildren = source.readInt();
+                for (int i = 0; i < numChildren; ++i) {
+                    node.addChild(readNodeContentsRecursive(source));
+                }
+
+                return node;
+            }
+        };
+    }
+
+    private long addBookmarkFromAPI(ContentValues values) {
+        BookmarkRow row = BookmarkRow.fromContentValues(values);
+        if (row.url == null) {
+            throw new IllegalArgumentException("Must have a bookmark URL");
+        }
+        return nativeAddBookmarkFromAPI(mNativeChromeBrowserProvider,
+                row.url, row.created, row.isBookmark, row.date, row.favicon,
+                row.title, row.visits, row.parentId);
+    }
+
+    private Cursor queryBookmarkFromAPI(String[] projectionIn, String selection,
+            String[] selectionArgs, String sortOrder) {
+        String[] projection = null;
+        if (projectionIn == null || projectionIn.length == 0) {
+            projection = BOOKMARK_DEFAULT_PROJECTION;
+        } else {
+            projection = projectionIn;
+        }
+
+        return nativeQueryBookmarkFromAPI(mNativeChromeBrowserProvider, projection, selection,
+                selectionArgs, sortOrder);
+    }
+
+    private int updateBookmarkFromAPI(ContentValues values, String selection,
+            String[] selectionArgs) {
+        BookmarkRow row = BookmarkRow.fromContentValues(values);
+        return nativeUpdateBookmarkFromAPI(mNativeChromeBrowserProvider,
+                row.url, row.created, row.isBookmark, row.date,
+                row.favicon, row.title, row.visits, row.parentId, selection, selectionArgs);
+    }
+
+    private int removeBookmarkFromAPI(String selection, String[] selectionArgs) {
+        return nativeRemoveBookmarkFromAPI(mNativeChromeBrowserProvider, selection, selectionArgs);
+    }
+
+    private int removeHistoryFromAPI(String selection, String[] selectionArgs) {
+        return nativeRemoveHistoryFromAPI(mNativeChromeBrowserProvider, selection, selectionArgs);
+    }
+
+    @CalledByNative
+    private void onBookmarkChanged() {
+        getContext().getContentResolver().notifyChange(
+                buildAPIContentUri(getContext(), BOOKMARKS_PATH), null);
+    }
+
+    @CalledByNative
+    private void onSearchTermChanged() {
+        getContext().getContentResolver().notifyChange(
+                buildAPIContentUri(getContext(), SEARCHES_PATH), null);
+    }
+
+    private long addSearchTermFromAPI(ContentValues values) {
+        SearchRow row = SearchRow.fromContentValues(values);
+        if (row.term == null) {
+            throw new IllegalArgumentException("Must have a search term");
+        }
+        return nativeAddSearchTermFromAPI(mNativeChromeBrowserProvider, row.term, row.date);
+    }
+
+    private int updateSearchTermFromAPI(ContentValues values, String selection,
+            String[] selectionArgs) {
+        SearchRow row = SearchRow.fromContentValues(values);
+        return nativeUpdateSearchTermFromAPI(mNativeChromeBrowserProvider,
+                row.term, row.date, selection, selectionArgs);
+    }
+
+    private Cursor querySearchTermFromAPI(String[] projectionIn, String selection,
+            String[] selectionArgs, String sortOrder) {
+        String[] projection = null;
+        if (projectionIn == null || projectionIn.length == 0) {
+            projection = android.provider.Browser.SEARCHES_PROJECTION;
+        } else {
+            projection = projectionIn;
+        }
+        return nativeQuerySearchTermFromAPI(mNativeChromeBrowserProvider, projection, selection,
+                selectionArgs, sortOrder);
+    }
+
+    private int removeSearchFromAPI(String selection, String[] selectionArgs) {
+        return nativeRemoveSearchTermFromAPI(mNativeChromeBrowserProvider,
+                selection, selectionArgs);
+    }
+
+    private static boolean isInUiThread() {
+        if (!ThreadUtils.runningOnUiThread()) return false;
+
+        if (!"REL".equals(Build.VERSION.CODENAME)) {
+            throw new IllegalStateException("Shouldn't run in the UI thread");
+        }
+
+        Log.w(TAG, "ChromeBrowserProvider methods cannot be called from the UI thread.");
+        return true;
+    }
+
+    private static Uri buildContentUri(String authority, String path) {
+        return Uri.parse("content://" + authority + "/" + path);
+    }
+
+    private static Uri buildAPIContentUri(Context context, String path) {
+        return buildContentUri(context.getPackageName() + API_AUTHORITY_SUFFIX, path);
+    }
+
+    private static String buildWhereClause(long id, String selection) {
+        StringBuffer sb = new StringBuffer();
+        sb.append(BaseColumns._ID);
+        sb.append(" = ");
+        sb.append(id);
+        if (!TextUtils.isEmpty(selection)) {
+            sb.append(" AND (");
+            sb.append(selection);
+            sb.append(")");
+        }
+        return sb.toString();
+    }
+
+    private static String buildHistoryWhereClause(long id, String selection) {
+        return buildWhereClause(id, buildBookmarkWhereClause(selection, false));
+    }
+
+    private static String buildHistoryWhereClause(String selection) {
+        return buildBookmarkWhereClause(selection, false);
+    }
+
+    /**
+     * @return a SQL where class which is inserted the bookmark condition.
+     */
+    private static String buildBookmarkWhereClause(String selection, boolean is_bookmark) {
+        StringBuffer sb = new StringBuffer();
+        sb.append(BookmarkColumns.BOOKMARK);
+        sb.append(is_bookmark ? " = 1 " : " = 0");
+        if (!TextUtils.isEmpty(selection)) {
+            sb.append(" AND (");
+            sb.append(selection);
+            sb.append(")");
+        }
+        return sb.toString();
+    }
+
+    private static String buildBookmarkWhereClause(long id, String selection) {
+        return buildWhereClause(id, buildBookmarkWhereClause(selection, true));
+    }
+
+    private static String buildBookmarkWhereClause(String selection) {
+        return buildBookmarkWhereClause(selection, true);
+    }
+
+    // Wrap the value of BookmarkColumn.
+    private static class BookmarkRow {
+        Boolean isBookmark;
+        Long created;
+        String url;
+        Long date;
+        byte[] favicon;
+        String title;
+        Integer visits;
+        long parentId;
+
+        static BookmarkRow fromContentValues(ContentValues values) {
+            BookmarkRow row = new BookmarkRow();
+            if (values.containsKey(BookmarkColumns.URL)) {
+                row.url = values.getAsString(BookmarkColumns.URL);
+            }
+            if (values.containsKey(BookmarkColumns.BOOKMARK)) {
+                row.isBookmark = values.getAsInteger(BookmarkColumns.BOOKMARK) != 0;
+            }
+            if (values.containsKey(BookmarkColumns.CREATED)) {
+                row.created = values.getAsLong(BookmarkColumns.CREATED);
+            }
+            if (values.containsKey(BookmarkColumns.DATE)) {
+                row.date = values.getAsLong(BookmarkColumns.DATE);
+            }
+            if (values.containsKey(BookmarkColumns.FAVICON)) {
+                row.favicon = values.getAsByteArray(BookmarkColumns.FAVICON);
+                // We need to know that the caller set the favicon column.
+                if (row.favicon == null) {
+                    row.favicon = new byte[0];
+                }
+            }
+            if (values.containsKey(BookmarkColumns.TITLE)) {
+                row.title = values.getAsString(BookmarkColumns.TITLE);
+            }
+            if (values.containsKey(BookmarkColumns.VISITS)) {
+                row.visits = values.getAsInteger(BookmarkColumns.VISITS);
+            }
+            if (values.containsKey(BOOKMARK_PARENT_ID_PARAM)) {
+                row.parentId = values.getAsLong(BOOKMARK_PARENT_ID_PARAM);
+            }
+            return row;
+        }
+    }
+
+    // Wrap the value of SearchColumn.
+    private static class SearchRow {
+        String term;
+        Long date;
+
+        static SearchRow fromContentValues(ContentValues values) {
+            SearchRow row = new SearchRow();
+            if (values.containsKey(SearchColumns.SEARCH)) {
+                row.term = values.getAsString(SearchColumns.SEARCH);
+            }
+            if (values.containsKey(SearchColumns.DATE)) {
+                row.date = values.getAsLong(SearchColumns.DATE);
+            }
+            return row;
+        }
+    }
+
+    /**
+     * Returns true if the native side of the class is initialized.
+     */
+    protected boolean isNativeSideInitialized() {
+        return mNativeChromeBrowserProvider != 0;
+    }
+
+    /**
+     * Make sure chrome is running. This method mustn't run on UI thread.
+     *
+     * @return Whether the native chrome process is running successfully once this has returned.
+     */
+    private boolean ensureNativeChromeLoaded() {
+        ensureUriMatcherInitialized();
+
+        synchronized(mLoadNativeLock) {
+            if (mNativeChromeBrowserProvider != 0) return true;
+
+            final AtomicBoolean retVal = new AtomicBoolean(true);
+            ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+                @Override
+                public void run() {
+                    retVal.set(ensureNativeChromeLoadedOnUIThread());
+                }
+            });
+            return retVal.get();
+        }
+    }
+
+    /**
+     * This method should only run on UI thread.
+     */
+    protected boolean ensureNativeChromeLoadedOnUIThread() {
+        if (isNativeSideInitialized()) return true;
+        mNativeChromeBrowserProvider = nativeInit();
+        return isNativeSideInitialized();
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        try {
+            // Tests might try to destroy this in the wrong thread.
+            ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+                @Override
+                public void run() {
+                    ensureNativeChromeDestroyedOnUIThread();
+                }
+            });
+        } finally {
+            super.finalize();
+        }
+    }
+
+    /**
+     * This method should only run on UI thread.
+     */
+    private void ensureNativeChromeDestroyedOnUIThread() {
+        if (isNativeSideInitialized()) {
+            nativeDestroy(mNativeChromeBrowserProvider);
+            mNativeChromeBrowserProvider = 0;
+        }
+    }
+
+    /**
+     * Call to get the intent to create a bookmark shortcut on homescreen.
+     */
+    public static Intent getShortcutToBookmark(String url, String title, Bitmap favicon, int rValue,
+            int gValue, int bValue, Activity activity) {
+        return BookmarkUtils.createAddToHomeIntent(activity, url, title, favicon, rValue, gValue,
+                bValue);
+    }
+
+    private native int nativeInit();
+    private native void nativeDestroy(int nativeChromeBrowserProvider);
+
+    // Public API native methods.
+    private native long nativeAddBookmark(int nativeChromeBrowserProvider,
+            String url, String title, boolean isFolder, long parentId);
+
+    private native int nativeRemoveBookmark(int nativeChromeBrowserProvider, long id);
+
+    private native int nativeUpdateBookmark(int nativeChromeBrowserProvider,
+            long id, String url, String title, long parentId);
+
+    private native long nativeAddBookmarkFromAPI(int nativeChromeBrowserProvider,
+            String url, Long created, Boolean isBookmark, Long date, byte[] favicon,
+            String title, Integer visits, long parentId);
+
+    private native SQLiteCursor nativeQueryBookmarkFromAPI(int nativeChromeBrowserProvider,
+            String[] projection, String selection, String[] selectionArgs, String sortOrder);
+
+    private native int nativeUpdateBookmarkFromAPI(int nativeChromeBrowserProvider,
+            String url, Long created, Boolean isBookmark, Long date, byte[] favicon,
+            String title, Integer visits, long parentId, String selection, String[] selectionArgs);
+
+    private native int nativeRemoveBookmarkFromAPI(int nativeChromeBrowserProvider,
+            String selection, String[] selectionArgs);
+
+    private native int nativeRemoveHistoryFromAPI(int nativeChromeBrowserProvider,
+            String selection, String[] selectionArgs);
+
+    private native long nativeAddSearchTermFromAPI(int nativeChromeBrowserProvider,
+            String term, Long date);
+
+    private native SQLiteCursor nativeQuerySearchTermFromAPI(int nativeChromeBrowserProvider,
+            String[] projection, String selection, String[] selectionArgs, String sortOrder);
+
+    private native int nativeUpdateSearchTermFromAPI(int nativeChromeBrowserProvider,
+            String search, Long date, String selection, String[] selectionArgs);
+
+    private native int nativeRemoveSearchTermFromAPI(int nativeChromeBrowserProvider,
+            String selection, String[] selectionArgs);
+
+    // Client API native methods.
+    private native boolean nativeBookmarkNodeExists(int nativeChromeBrowserProvider, long id);
+
+    private native long nativeCreateBookmarksFolderOnce(int nativeChromeBrowserProvider,
+            String title, long parentId);
+
+    private native BookmarkNode nativeGetAllBookmarkFolders(int nativeChromeBrowserProvider);
+
+    private native BookmarkNode nativeGetBookmarkNode(int nativeChromeBrowserProvider,
+            long id, boolean getParent, boolean getChildren);
+
+    private native BookmarkNode nativeGetMobileBookmarksFolder(int nativeChromeBrowserProvider);
+
+    private native boolean nativeIsBookmarkInMobileBookmarksBranch(int nativeChromeBrowserProvider,
+            long id);
+
+    private native byte[] nativeGetFaviconOrTouchIcon(int nativeChromeBrowserProvider, String url);
+
+    private native byte[] nativeGetThumbnail(int nativeChromeBrowserProvider, String url);
+}