Remove unnecessary 'virtual' annotation from mojo

mojo/services/html_viewer/mojo_blink_platform_impl.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 MOJO_SERVICES_HTML_VIEWER_MOJO_BLINK_PLATFORM_IMPL_H_
 #define MOJO_SERVICES_HTML_VIEWER_MOJO_BLINK_PLATFORM_IMPL_H_
 
 #include "mojo/services/html_viewer/blink_platform_impl.h"
 
 #include "mojo/services/network/public/interfaces/network_service.mojom.h"
 
 namespace mojo {
 class ApplicationImpl;
 }
 
 namespace html_viewer {
 
 class WebClipboardImpl;
 class WebCookieJarImpl;
 
 class MojoBlinkPlatformImpl : public BlinkPlatformImpl {
  public:
   MojoBlinkPlatformImpl(mojo::ApplicationImpl* app);
   virtual ~MojoBlinkPlatformImpl();
 
  private:
   // BlinkPlatform
-  virtual blink::WebURLLoader* createURLLoader() override;
-  virtual blink::WebSocketHandle* createWebSocketHandle() override;
+  blink::WebURLLoader* createURLLoader() override;
+  blink::WebSocketHandle* createWebSocketHandle() override;
 
   mojo::NetworkServicePtr network_service_;
   scoped_ptr<WebCookieJarImpl> cookie_jar_;
   scoped_ptr<WebClipboardImpl> clipboard_;
 };
 
 }  // namespace html_viewer
 
 #endif  // MOJO_SERVICES_HTML_VIEWER_MOJO_BLINK_PLATFORM_IMPL_H_