[Sync] Add support for identifying tabbed activites

chrome/browser/ui/android/tab_model/tab_model_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/android/tab_android.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/ui/android/tab_model/tab_model.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
@@ skipping 26 matching lines @@
   content::WebContents* GetWebContentsAt(int index) const override {
     return NULL;
   }
   void CreateTab(TabAndroid* parent,
                  content::WebContents* web_contents,
                  int parent_tab_id) override {}
   content::WebContents* CreateNewTabForDevTools(const GURL& url) override {
     return NULL;
   }
   bool IsSessionRestoreInProgress() const override { return false; }
+  bool IsTabbedActivity() const override { return false; }
   TabAndroid* GetTabAt(int index) const override { return NULL; }
   void SetActiveIndex(int index) override {}
   void CloseTabAt(int index) override {}
 };
 
 TEST_F(TabModelTest, TestProfileHandling) {
   // Construct TabModel with standard Profile.
   TestingProfile testing_profile;
   TestTabModel tab_model(&testing_profile);
 
@@ skipping 22 matching lines @@
   EXPECT_EQ(&testing_profile, tab_model.GetProfile());
   EXPECT_TRUE(tab_model.IsOffTheRecord());
 
   // Notify profile is being destroyed and verify pointer is cleared.
   content::NotificationService::current()->Notify(
     chrome::NOTIFICATION_PROFILE_DESTROYED,
     content::Source<Profile>(&testing_profile),
     content::NotificationService::NoDetails());
   EXPECT_EQ(NULL, tab_model.GetProfile());
 }