Remove Lo-Fi snackbar code

chrome/android/java/src/org/chromium/chrome/browser/snackbar/LofiBarController.java

Index: chrome/android/java/src/org/chromium/chrome/browser/snackbar/LofiBarController.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/snackbar/LofiBarController.java b/chrome/android/java/src/org/chromium/chrome/browser/snackbar/LofiBarController.java
deleted file mode 100644
index 6906a853cb358f2b64947d3309d5798a4ba8ee52..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/snackbar/LofiBarController.java
+++ /dev/null
@@ -1,174 +0,0 @@
-// 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.snackbar;
-
-import android.content.Context;
-
-import org.chromium.base.CommandLine;
-import org.chromium.chrome.R;
-import org.chromium.chrome.browser.ChromeSwitches;
-import org.chromium.chrome.browser.net.spdyproxy.DataReductionProxySettings;
-import org.chromium.chrome.browser.preferences.datareduction.DataReductionProxyUma;
-import org.chromium.chrome.browser.tab.EmptyTabObserver;
-import org.chromium.chrome.browser.tab.Tab;
-import org.chromium.chrome.browser.tab.TabObserver;
-
-/**
- * Each time a tab loads with Lo-Fi this controller saves that tab id and title to the stack of
- * SnackbarManager. It will then let SnackbarManager show a snackbar representing the top entry
- * of the stack.
- * <p/>
- * When the load images button is clicked, it will reload the page without Lo-Fi.
- */
-public class LofiBarController implements SnackbarManager.SnackbarController {
-    /** Snackbar types */
-    private static final int LOFI_SNACKBAR = 0;
-    private static final int PREVIEW_SNACKBAR = 1;
-
-    private static final int DEFAULT_LO_FI_SNACKBAR_SHOW_DURATION_MS = 6000;
-    private final SnackbarManager mSnackbarManager;
-    private final Context mContext;
-    private final boolean mDisabled;
-    private Tab mTab;
-    private TabObserver mTabObserver;
-    private boolean mLoFiPopupShownForPageLoad = false;
-
-    /**
-     * Creates an instance of a {@link LofiBarController}.
-     * @param context The {@link Context} in which snackbar is shown.
-     * @param snackbarManager The manager that helps to show up snackbar.
-     */
-    public LofiBarController(Context context, SnackbarManager snackbarManager) {
-        mSnackbarManager = snackbarManager;
-        mContext = context;
-        mDisabled = CommandLine.getInstance().hasSwitch(ChromeSwitches.DISABLE_LOFI_SNACKBAR);
-    }
-
-    /**
-     * Called on new page loads to indicate that a Lo-Fi snackbar has not been shown yet.
-     */
-    public void resetLoFiPopupShownForPageLoad() {
-        mLoFiPopupShownForPageLoad = false;
-    }
-
-    /**
-     * If a Lo-Fi snackbar has not been shown for the current page load, creates a Lo-Fi snackbar
-     * for the given tab and shows it. If the tab is hidden, waits until it is visible to show the
-     * snackbar.
-     *
-     * @param tab The tab to show the snackbar on.
-     * @param isPreview Whether the snackbar should have the Lo-Fi preview message.
-     */
-    public void maybeCreateLoFiBar(Tab tab, final boolean isPreview) {
-        if (mLoFiPopupShownForPageLoad) return;
-        mLoFiPopupShownForPageLoad = true;
-        if (tab.isHidden()) {
-            TabObserver tabObserver = new EmptyTabObserver() {
-                @Override
-                public void onShown(Tab tab) {
-                    showLoFiBar(tab, isPreview);
-                    tab.removeObserver(this);
-                }
-            };
-            tab.addObserver(tabObserver);
-        } else {
-            showLoFiBar(tab, isPreview);
-        }
-    }
-
-    /**
-     * @param tab The tab. Saved to reload the page.
-     */
-    private void showLoFiBar(Tab tab, boolean isPreview) {
-        if (mDisabled) return;
-        mTab = tab;
-
-        mTabObserver = new EmptyTabObserver() {
-            @Override
-            public void onHidden(Tab tab) {
-                dismissLoFiBar();
-            }
-
-            @Override
-            public void onDestroyed(Tab tab) {
-                dismissLoFiBar();
-            }
-
-            @Override
-            public void onDidStartProvisionalLoadForFrame(Tab tab, long frameId,
-                    long parentFrameId, boolean isMainFrame, String validatedUrl,
-                    boolean isErrorPage, boolean isIframeSrcdoc) {
-                // When a provisional load is started for the main frame, the boolean storing if
-                // the Lo-Fi snackbar has been shown is reset. If there was a previous Lo-Fi
-                // snackbar showing, remove it.
-                if (isMainFrame) dismissLoFiBar();
-            }
-
-        };
-        tab.addObserver(mTabObserver);
-
-        String message = mContext
-                .getString(isPreview ? R.string.data_reduction_lo_fi_preview_snackbar_message
-                        : R.string.data_reduction_lo_fi_snackbar_message);
-        String buttonText = mContext
-                .getString(isPreview ? R.string.data_reduction_lo_fi_preview_snackbar_action
-                        : R.string.data_reduction_lo_fi_snackbar_action);
-
-        mSnackbarManager.showSnackbar(
-                Snackbar.make(message, this, Snackbar.TYPE_NOTIFICATION, Snackbar.UMA_LOFI)
-                        .setAction(buttonText, isPreview ? PREVIEW_SNACKBAR : LOFI_SNACKBAR)
-                        .setDuration(DEFAULT_LO_FI_SNACKBAR_SHOW_DURATION_MS));
-        DataReductionProxySettings.getInstance().incrementLoFiSnackbarShown();
-        DataReductionProxyUma.dataReductionProxyLoFiUIAction(
-                DataReductionProxyUma.ACTION_LOAD_IMAGES_SNACKBAR_SHOWN);
-    }
-
-    /**
-     * Dismisses the snackbar.
-     */
-    private void dismissLoFiBar() {
-        removeTabObserver();
-        if (mSnackbarManager.isShowing()) mSnackbarManager.dismissSnackbars(this);
-    }
-
-    /**
-     * Removes the TabObserver.
-     */
-    private void removeTabObserver() {
-        mTab.removeObserver(mTabObserver);
-        mTabObserver = null;
-    }
-
-    /**
-     * Reloads the page showing all images.
-     */
-    @Override
-    public void onAction(Object actionData) {
-        removeTabObserver();
-
-        if (actionData == null) return;
-        int snackbarType = (int) actionData;
-        switch (snackbarType) {
-            case PREVIEW_SNACKBAR:
-                mTab.reloadDisableLoFi();
-                break;
-            case LOFI_SNACKBAR:
-                mTab.reloadLoFiImages();
-                break;
-            default:
-                assert false;
-                break;
-        }
-
-        DataReductionProxySettings.getInstance().incrementLoFiUserRequestsForImages();
-        DataReductionProxyUma.dataReductionProxyLoFiUIAction(
-                DataReductionProxyUma.ACTION_LOAD_IMAGES_SNACKBAR_CLICKED);
-    }
-
-    @Override
-    public void onDismissNoAction(Object actionData) {
-        removeTabObserver();
-    }
-}