Update {virtual,override} to follow C++11 style in remoting.

remoting/host/clipboard_win.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 "remoting/host/clipboard.h"
 
 #include <windows.h>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 91 matching lines @@
 
 }  // namespace
 
 namespace remoting {
 
 class ClipboardWin : public Clipboard {
  public:
   ClipboardWin();
   ~ClipboardWin() override;
 
-  virtual void Start(
+  void Start(
       scoped_ptr<protocol::ClipboardStub> client_clipboard) override;
-  virtual void InjectClipboardEvent(
+  void InjectClipboardEvent(
       const protocol::ClipboardEvent& event) override;
 
  private:
   void OnClipboardUpdate();
 
   // Handles messages received by |window_|.
   bool HandleMessage(UINT message,
                      WPARAM wparam,
                      LPARAM lparam,
                      LRESULT* result);
@@ skipping 146 matching lines @@
   }
 
   return false;
 }
 
 scoped_ptr<Clipboard> Clipboard::Create() {
   return make_scoped_ptr(new ClipboardWin());
 }
 
 }  // namespace remoting