Add support for highlighting menu items

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.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;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.SearchManager;
@@ skipping 497 matching lines @@
                 }
                 if (!isVisible) {
                     mAppMenuPropertiesDelegate.onMenuDismissed();
                     MenuItem updateMenuItem = mAppMenuHandler.getAppMenu().getMenu().findItem(
                             R.id.update_menu_id);
                     if (updateMenuItem != null && updateMenuItem.isVisible()) {
                         UpdateMenuItemHelper.getInstance().onMenuDismissed();
                     }
                 }
             }
+
+            @Override
+            public void onMenuHighlightChanged(boolean highlighting) {}
         });
     }
 
     /**
      * Initialize the {@link TabModelSelector}, {@link TabModel}s, and
      * {@link org.chromium.chrome.browser.tabmodel.TabCreatorManager.TabCreator} needed by
      * this activity.
      */
     protected final void initializeTabModels() {
         if (mTabModelsInitialized) return;
@@ skipping 1650 matching lines @@
      * draw over VR contents should be hidden in this call.
      */
     public void onEnterVR() {}
 
     /**
      * Called when VR mode using this activity is exited. Any state set for VR should be restored
      * in this call, including showing 2D UI that was hidden.
      */
     public void onExitVR() {}
 }