[Sync] Add support for identifying tabbed activites

chrome/browser/ui/android/tab_model/tab_model_jni_bridge.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_UI_ANDROID_TAB_MODEL_TAB_MODEL_JNI_BRIDGE_H_
 #define CHROME_BROWSER_UI_ANDROID_TAB_MODEL_TAB_MODEL_JNI_BRIDGE_H_
 
 #include <jni.h>
 #include <vector>
 
@@ skipping 29 matching lines @@
       const base::android::JavaParamRef<jobject>& obj);
   void TabAddedToModel(JNIEnv* env,
                        const base::android::JavaParamRef<jobject>& obj,
                        const base::android::JavaParamRef<jobject>& jtab);
 
   // TabModel::
   int GetTabCount() const override;
   int GetActiveIndex() const override;
   content::WebContents* GetWebContentsAt(int index) const override;
   TabAndroid* GetTabAt(int index) const override;
+  bool IsTabbedActivity() const override;
 
   void SetActiveIndex(int index) override;
   void CloseTabAt(int index) override;
 
   void CreateTab(TabAndroid* parent,
                  content::WebContents* web_contents,
                  int parent_tab_id) override;
 
   content::WebContents* CreateNewTabForDevTools(const GURL& url) override;
 
   // Return true if we are currently restoring sessions asynchronously.
   bool IsSessionRestoreInProgress() const override;
 
   // Instructs the TabModel to broadcast a notification that all tabs are now
   // loaded from storage.
   void BroadcastSessionRestoreComplete(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj);
 
  protected:
   JavaObjectWeakGlobalRef java_object_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TabModelJniBridge);
 };
 
 #endif  // CHROME_BROWSER_UI_ANDROID_TAB_MODEL_TAB_MODEL_JNI_BRIDGE_H_