Convert renderer JS memory usage reporting to use Mojo.

chrome/renderer/chrome_render_process_observer.h

 // 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.
 
 #ifndef CHROME_RENDERER_CHROME_RENDER_PROCESS_OBSERVER_H_
 #define CHROME_RENDERER_CHROME_RENDER_PROCESS_OBSERVER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 36 matching lines @@
   void OnFieldTrialGroupFinalized(const std::string& trial_name,
                                   const std::string& group_name) override;
 
   void OnSetIsIncognitoProcess(bool is_incognito_process);
   void OnSetContentSettingsForCurrentURL(
       const GURL& url, const ContentSettings& content_settings);
   void OnSetContentSettingRules(const RendererContentSettingRules& rules);
   void OnGetCacheResourceStats();
   void OnSetFieldTrialGroup(const std::string& fiel_trial_name,
                             const std::string& group_name);
-  void OnGetV8HeapStats();
 
   static bool is_incognito_process_;
   scoped_ptr<content::ResourceDispatcherDelegate> resource_delegate_;
   RendererContentSettingRules content_setting_rules_;
 
   bool webkit_initialized_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderProcessObserver);
 };
 
 #endif  // CHROME_RENDERER_CHROME_RENDER_PROCESS_OBSERVER_H_