[Contextual Search] Add Mojo-enabled API component.

chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManager.java

 // 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 android.app.Activity;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewTreeObserver;
@@ skipping 29 matching lines @@
 import org.chromium.chrome.browser.tabmodel.TabModelSelector;
 import org.chromium.chrome.browser.tabmodel.TabModelSelectorTabObserver;
 import org.chromium.chrome.browser.widget.findinpage.FindToolbarManager;
 import org.chromium.chrome.browser.widget.findinpage.FindToolbarObserver;
 import org.chromium.components.navigation_interception.NavigationParams;
 import org.chromium.content.browser.ContentViewCore;
 import org.chromium.content.browser.ContextualSearchClient;
 import org.chromium.content_public.browser.GestureStateListener;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.content_public.browser.NavigationEntry;
-import org.chromium.content_public.browser.WebContentsObserver;
 import org.chromium.content_public.common.TopControlsState;
 import org.chromium.ui.base.WindowAndroid;
 
 import java.net.MalformedURLException;
 import java.net.URL;
 
 import javax.annotation.Nullable;
 
 
 /**
@@ skipping 20 matching lines @@
 
     // We blacklist this URL because malformed URLs may bring up this page.
     private static final String BLACKLISTED_URL = "about:blank";
 
     private final ContextualSearchSelectionController mSelectionController;
     private final ChromeActivity mActivity;
     private ViewGroup mParentView;
     private final ViewTreeObserver.OnGlobalFocusChangeListener mOnFocusChangeListener;
 
     private final WindowAndroid mWindowAndroid;
-    private WebContentsObserver mSearchWebContentsObserver;
     private ContextualSearchContentViewDelegate mSearchContentViewDelegate;
     private final ContextualSearchTabPromotionDelegate mTabPromotionDelegate;
     private TabModelSelectorTabObserver mTabModelSelectorTabObserver;
     private TabModelObserver mTabModelObserver;
     private FindToolbarManager mFindToolbarManager;
     private FindToolbarObserver mFindToolbarObserver;
     private boolean mIsSearchContentViewShowing;
     private boolean mDidStartLoadingResolvedSearchRequest;
     private long mLoadedSearchUrlTimeMs;
     // TODO(donnd): consider changing this member's name to indicate "opened" instead of "seen".
@@ skipping 757 matching lines @@
                     mSearchRequest.setNormalPriority();
                     loadSearchUrl();
                 }
                 mShouldLoadDelayedSearch = true;
                 mPolicy.updateCountersForOpen();
             }
         }
 
         @Override
         public void onContentViewCreated(ContentViewCore contentViewCore) {
+            if (mPolicy.shouldInjectJavaScript()) {
+                // Enable a JavaScript communication channel between our service and the new view.
+                nativeEnableContextualSearchServiceForView(mNativeContextualSearchManagerPtr,
+                        contentViewCore);
+            }
+
             // TODO(mdjones): Move SearchContentViewDelegate ownership to panel.
             mSearchContentViewDelegate.setContextualSearchContentViewCore(contentViewCore);
         }
 
         @Override
         public void onContentViewDestroyed() {
             if (mSearchContentViewDelegate != null) {
                 mSearchContentViewDelegate.releaseContextualSearchContentViewCore();
             }
         }
@@ skipping 342 matching lines @@
     // --------------------------------------------------------------------------------------------
 
     private native long nativeInit();
     private native void nativeDestroy(long nativeContextualSearchManager);
     private native void nativeStartSearchTermResolutionRequest(long nativeContextualSearchManager,
             String selection, boolean useResolvedSearchTerm, ContentViewCore baseContentViewCore,
             boolean maySendBasePageUrl);
     private native void nativeGatherSurroundingText(long nativeContextualSearchManager,
             String selection, boolean useResolvedSearchTerm, ContentViewCore baseContentViewCore,
             boolean maySendBasePageUrl);
+    private native void nativeEnableContextualSearchServiceForView(
+            long nativeContextualSearchManager, ContentViewCore overlayContentViewCore);
 }