Merge java_staging/src into java/src.

chrome/android/java_staging/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchTabHelper.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchTabHelper.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchTabHelper.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchTabHelper.java
deleted file mode 100644
index 04b7eb38bd100f1b0b79e47085bcd003bbf7bb28..0000000000000000000000000000000000000000
--- a/chrome/android/java_staging/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchTabHelper.java
+++ /dev/null
@@ -1,184 +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.contextualsearch;
-
-import org.chromium.base.CalledByNative;
-import org.chromium.chrome.browser.ChromeActivity;
-import org.chromium.chrome.browser.EmptyTabObserver;
-import org.chromium.chrome.browser.Tab;
-import org.chromium.chrome.browser.preferences.PrefServiceBridge;
-import org.chromium.chrome.browser.profiles.Profile;
-import org.chromium.chrome.browser.search_engines.TemplateUrlService;
-import org.chromium.chrome.browser.search_engines.TemplateUrlService.TemplateUrlServiceObserver;
-import org.chromium.content.browser.ContentViewCore;
-import org.chromium.content_public.browser.GestureStateListener;
-
-/**
- * Manages the activation and gesture listeners for ContextualSearch on a given tab.
- */
-public class ContextualSearchTabHelper extends EmptyTabObserver {
-    /**
-     * Notification handler for Contextual Search events.
-     */
-    private final TemplateUrlServiceObserver mTemplateUrlObserver =
-            new TemplateUrlServiceObserver() {
-                @Override
-                public void onTemplateURLServiceChanged() {
-                    onContextualSearchPrefChanged();
-                }
-            };
-
-    /**
-     * The current ContentViewCore for the Tab which this helper is monitoring.
-     */
-    private ContentViewCore mBaseContentViewCore;
-
-    /**
-     * The GestureListener used for handling events from the current ContentViewCore.
-     */
-    private GestureStateListener mGestureStateListener;
-
-    private long mNativeHelper = 0;
-
-    /**
-     * Creates a contextual search tab helper for the given tab.
-     * @param tab The tab whose contextual search actions will be handled by this helper.
-     */
-    public static void createForTab(Tab tab) {
-        new ContextualSearchTabHelper(tab);
-    }
-
-    private ContextualSearchTabHelper(Tab tab) {
-        tab.addObserver(this);
-    }
-
-    @Override
-    public void onPageLoadStarted(Tab tab, String url) {
-        if (tab.getContentViewCore() == null) {
-            // Nothing to do yet.
-            return;
-        }
-
-        mBaseContentViewCore = tab.getContentViewCore();
-        // Add Contextual Search here in case it couldn't get added in onContentChanged() due to
-        // being too early in initialization of Chrome (ContextualSearchManager being null).
-        setContextualSearchHooks(mBaseContentViewCore);
-    }
-
-    @Override
-    public void onPageLoadFinished(Tab tab) {
-        // Native initialization happens after a page loads to ensure profile is initialized.
-        if (mNativeHelper == 0) {
-            mNativeHelper = nativeInit(tab.getProfile());
-        }
-    }
-
-    @Override
-    public void onContentChanged(Tab tab) {
-        updateHooksForNewContentViewCore(tab);
-    }
-
-    @Override
-    public void onWebContentsSwapped(Tab tab, boolean didStartLoad, boolean didFinishLoad) {
-        updateHooksForNewContentViewCore(tab);
-    }
-
-    @Override
-    public void onDestroyed(Tab tab) {
-        if (mNativeHelper != 0) {
-            nativeDestroy(mNativeHelper);
-            mNativeHelper = 0;
-        }
-        removeContextualSearchHooks(mBaseContentViewCore);
-        mBaseContentViewCore = null;
-    }
-
-    /**
-     * Should be called whenever the Tab's ContentViewCore changes. Removes hooks from the
-     * existing ContentViewCore, if necessary and then adds hooks for the new ContentViewCore.
-     * @param tab
-     */
-    private void updateHooksForNewContentViewCore(Tab tab) {
-        removeContextualSearchHooks(mBaseContentViewCore);
-        mBaseContentViewCore = tab.getContentViewCore();
-        setContextualSearchHooks(mBaseContentViewCore);
-    }
-
-    /**
-     * Sets up the Contextual Search hooks, adding or removing them depending on whether it is
-     * currently active.
-     * @param cvc The content view core to attach the gesture state listener to.
-     */
-    private void setContextualSearchHooks(ContentViewCore cvc) {
-        if (cvc == null) return;
-
-        if (isContextualSearchActive(cvc)) {
-            addContextualSearchHooks(cvc);
-        } else {
-            removeContextualSearchHooks(cvc);
-        }
-    }
-
-    /**
-     * Adds Contextual Search hooks for its client and listener to the given content view core.
-     * @param cvc The content view core to attach the gesture state listener to.
-     */
-    private void addContextualSearchHooks(ContentViewCore cvc) {
-        if (mGestureStateListener == null) {
-            mGestureStateListener = getContextualSearchManager(cvc).getGestureStateListener();
-            cvc.addGestureStateListener(mGestureStateListener);
-            cvc.setContextualSearchClient(getContextualSearchManager(cvc));
-            TemplateUrlService.getInstance().addObserver(mTemplateUrlObserver);
-        }
-    }
-
-    /**
-     * Removes Contextual Search hooks for its client and listener from the given content view core.
-     * @param cvc The content view core to detach the gesture state listener from.
-     */
-    private void removeContextualSearchHooks(ContentViewCore cvc) {
-        if (cvc == null) return;
-
-        if (mGestureStateListener != null) {
-            cvc.removeGestureStateListener(mGestureStateListener);
-            mGestureStateListener = null;
-            cvc.setContextualSearchClient(null);
-            TemplateUrlService.getInstance().removeObserver(mTemplateUrlObserver);
-        }
-    }
-
-    /**
-     * @return whether Contextual Search is enabled and active in this tab.
-     */
-    private static boolean isContextualSearchActive(ContentViewCore cvc) {
-        return !cvc.getWebContents().isIncognito() && getContextualSearchManager(cvc) != null
-            && !PrefServiceBridge.getInstance().isContextualSearchDisabled()
-            && TemplateUrlService.getInstance().isDefaultSearchEngineGoogle()
-            // Svelte and Accessibility devices are incompatible with the first-run flow and
-            // Talkback has poor interaction with tap to search (see http://crbug.com/399708 and
-            // http://crbug.com/396934).
-            // TODO(jeremycho): Handle these cases.
-            && !getContextualSearchManager(cvc).isRunningInCompatibilityMode();
-    }
-
-    /**
-     * @return the Contextual Search manager.
-     */
-    private static ContextualSearchManager getContextualSearchManager(ContentViewCore cvc) {
-        // TODO(yfriedman): Decouple this from the activity.
-        if (cvc.getContext() instanceof ChromeActivity) {
-            return ((ChromeActivity) cvc.getContext()).getContextualSearchManager();
-        }
-        return null;
-    }
-
-    @CalledByNative
-    private void onContextualSearchPrefChanged() {
-        setContextualSearchHooks(mBaseContentViewCore);
-    }
-
-    private native long nativeInit(Profile profile);
-    private native void nativeDestroy(long nativeContextualSearchTabHelper);
-}