Standardize usage of virtual/override/final in extensions/

extensions/renderer/guest_view/guest_view_container.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_RENDERER_GUEST_VIEW_GUEST_VIEW_CONTAINER_H_
 #define CHROME_RENDERER_GUEST_VIEW_GUEST_VIEW_CONTAINER_H_
 
 #include <queue>
 
 #include "base/memory/linked_ptr.h"
@@ skipping 38 matching lines @@
    private:
     const int element_instance_id_;
     const int guest_instance_id_;
     scoped_ptr<base::DictionaryValue> params_;
     ScopedPersistent<v8::Function> callback_;
     v8::Isolate* const isolate_;
   };
 
   GuestViewContainer(content::RenderFrame* render_frame,
                      const std::string& mime_type);
-  virtual ~GuestViewContainer();
+  ~GuestViewContainer() override;
 
   static GuestViewContainer* FromID(int render_view_routing_id,
                                     int element_instance_id);
 
   void AttachGuest(linked_ptr<AttachRequest> request);
 
   // BrowserPluginDelegate implementation.
-  virtual void SetElementInstanceID(int element_instance_id) override;
-  virtual void DidFinishLoading() override;
-  virtual void DidReceiveData(const char* data, int data_length) override;
-  virtual void Ready() override;
+  void SetElementInstanceID(int element_instance_id) override;
+  void DidFinishLoading() override;
+  void DidReceiveData(const char* data, int data_length) override;
+  void Ready() override;
 
   // RenderFrameObserver override.
-  virtual void OnDestruct() override;
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
+  void OnDestruct() override;
+  bool OnMessageReceived(const IPC::Message& message) override;
 
  private:
   void OnCreateMimeHandlerViewGuestACK(int element_instance_id);
   void OnGuestAttached(int element_instance_id, int guest_proxy_routing_id);
 
   void AttachGuestInternal(linked_ptr<AttachRequest> request);
   void EnqueueAttachRequest(linked_ptr<AttachRequest> request);
   void PerformPendingAttachRequest();
   void HandlePendingResponseCallback(int guest_proxy_routing_id);
 
@@ skipping 11 matching lines @@
 
   std::deque<linked_ptr<AttachRequest> > pending_requests_;
   linked_ptr<AttachRequest> pending_response_;
 
   DISALLOW_COPY_AND_ASSIGN(GuestViewContainer);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_GUEST_VIEW_GUEST_VIEW_CONTAINER_H_