Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/help/HelpAndFeedback.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/help/HelpAndFeedback.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/help/HelpAndFeedback.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/help/HelpAndFeedback.java
new file mode 100644
index 0000000000000000000000000000000000000000..474af23a4505a310c81486b93cc37bd55d3906cf
--- /dev/null
+++ b/chrome/android/java_staging/src/org/chromium/chrome/browser/help/HelpAndFeedback.java
@@ -0,0 +1,110 @@
+// Copyright 2015 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.help;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.provider.Browser;
+import android.text.TextUtils;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.base.annotations.SuppressFBWarnings;
+import org.chromium.chrome.browser.ChromeMobileApplication;
+import org.chromium.chrome.browser.UrlConstants;
+import org.chromium.chrome.browser.UrlUtilities;
+
+/**
+ * Launches an activity that displays a relevant support page and has an option to provide feedback.
+ */
+public class HelpAndFeedback {
+
+    // These constants should be in sync with the context names on go/mobilehelprecs.
+    // If the context ID cannot be found, the default help page will be shown to the user.
+    public static final String CONTEXT_NEW_TAB = "mobile_new_tab";
+    public static final String CONTEXT_SEARCH_RESULTS = "mobile_search_results";
+    public static final String CONTEXT_WEBPAGE = "mobile_webpage";
+    public static final String CONTEXT_SETTINGS = "mobile_settings";
+    public static final String CONTEXT_INCOGNITO = "mobile_incognito";
+    public static final String CONTEXT_BOOKMARKS = "mobile_bookmarks";
+    public static final String CONTEXT_HISTORY = "mobile_history";
+    public static final String CONTEXT_ERROR = "mobile_error";  // not used for now
+    public static final String CONTEXT_PRIVACY = "mobile_privacy";  // not added for now
+    public static final String CONTEXT_TRANSLATE = "mobile_translate";  // not added for now
+    public static final String CONTEXT_GENERAL = "mobile_general";
+
+    protected static final String FALLBACK_SUPPORT_URL =
+            "https://support.google.com/chrome/topic/6069782";
+
+    private static HelpAndFeedback sInstance;
+
+    /**
+     * Returns the singleton instance of HelpAndFeedback, creating it if needed.
+     */
+    @SuppressFBWarnings("LI_LAZY_INIT_STATIC")
+    public static HelpAndFeedback getInstance(Context context) {
+        ThreadUtils.assertOnUiThread();
+        if (sInstance == null) {
+            sInstance = ((ChromeMobileApplication) context.getApplicationContext())
+                    .createHelpAndFeedback();
+        }
+        return sInstance;
+    }
+
+    /**
+     * Starts an activity showing a help page for the specified context ID.
+     *
+     * @param activity The activity to use for starting the help activity and to take a
+     *                 screenshot of.
+     * @param helpContext One of the CONTEXT_* constants. This should describe the user's current
+     *                    context and will be used to show a more relevant help page.
+     * @param screenshot A screenshot of the current activity to include in the feedback the
+     *                   user sends, if any. If null, this method will take a screenshot of the
+     *                   activity (which will show a rendered page as black).
+     * @param url The URL of the current tab to include in the feedback the user sends, if any.
+     *            This parameter can be null.
+     */
+    public void show(Activity activity, String helpContext, Bitmap screenshot, String url) {
+        launchFallbackSupportUri(activity);
+    }
+
+    /**
+     * Get help context ID from URL.
+     *
+     * @param url The URL to be checked.
+     * @param isIncognito Whether we are in incognito mode or not.
+     * @return Help context ID that matches the URL and incognito mode.
+     */
+    public static String getHelpContextIdFromUrl(String url, boolean isIncognito) {
+        if (TextUtils.isEmpty(url)) {
+            return CONTEXT_GENERAL;
+        } else if (url.startsWith(UrlConstants.BOOKMARKS_URL)) {
+            return CONTEXT_BOOKMARKS;
+        } else if (url.equals(UrlConstants.HISTORY_URL)) {
+            return CONTEXT_HISTORY;
+        // Note: For www.google.com the following function returns false.
+        } else if (UrlUtilities.nativeIsGoogleSearchUrl(url)) {
+            return CONTEXT_SEARCH_RESULTS;
+        // For incognito NTP, we want to show incognito help.
+        } else if (isIncognito) {
+            return CONTEXT_INCOGNITO;
+        } else if (url.equals(UrlConstants.NTP_URL)) {
+            return CONTEXT_NEW_TAB;
+        }
+        return CONTEXT_WEBPAGE;
+    }
+
+    protected static void launchFallbackSupportUri(Context context) {
+        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(FALLBACK_SUPPORT_URL));
+        // Let Chrome know that this intent is from Chrome, so that it does not close the app when
+        // the user presses 'back' button.
+        intent.putExtra(Browser.EXTRA_APPLICATION_ID, context.getPackageName());
+        intent.putExtra(Browser.EXTRA_CREATE_NEW_TAB, true);
+        intent.setPackage(context.getPackageName());
+        context.startActivity(intent);
+    }
+}