Enable audio/video tag in content_shell

chrome/renderer/chrome_render_process_observer.h

 // Copyright (c) 2011 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_
 #pragma once
 
 #include <string>
 
@@ skipping 30 matching lines @@
   // any 'clear cache' commands that were delayed until the next navigation.
   void ExecutePendingClearCache();
 
   // Returns a pointer to the content setting rules owned by
   // |ChromeRenderProcessObserver|.
   const RendererContentSettingRules* content_setting_rules() const;
 
  private:
   // RenderProcessObserver implementation.
   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
-  virtual void WebKitInitialized() OVERRIDE;
 
   void OnSetIsIncognitoProcess(bool is_incognito_process);
   void OnSetContentSettingsForCurrentURL(
       const GURL& url, const ContentSettings& content_settings);
   void OnSetContentSettingRules(const RendererContentSettingRules& rules);
   void OnSetCacheCapacities(size_t min_dead_capacity,
                             size_t max_dead_capacity,
                             size_t capacity);
   // If |on_navigation| is true, the clearing is delayed until the next
   // navigation event.
@@ skipping 11 matching lines @@
   scoped_ptr<content::ResourceDispatcherDelegate> resource_delegate_;
   chrome::ChromeContentRendererClient* client_;
   // If true, the web cache shall be cleared before the next navigation event.
   bool clear_cache_pending_;
   RendererContentSettingRules content_setting_rules_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderProcessObserver);
 };
 
 #endif  // CHROME_RENDERER_CHROME_RENDER_PROCESS_OBSERVER_H_