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

remoting/host/win/wts_session_process_delegate.cc

Index: remoting/host/win/wts_session_process_delegate.cc
diff --git a/remoting/host/win/wts_session_process_delegate.cc b/remoting/host/win/wts_session_process_delegate.cc
index 66d7f0c02bb35ffcd0d0674c877de779cb893027..8130599ebd14bf50a998d90f25514bc9f81577b8 100644
--- a/remoting/host/win/wts_session_process_delegate.cc
+++ b/remoting/host/win/wts_session_process_delegate.cc
@@ -63,17 +63,17 @@ class WtsSessionProcessDelegate::Core
 
  private:
   friend class base::RefCountedThreadSafe<Core>;
-  virtual ~Core();
+  ~Core() override;
 
   // base::MessagePumpForIO::IOHandler implementation.
-  virtual void OnIOCompleted(base::MessagePumpForIO::IOContext* context,
-                             DWORD bytes_transferred,
-                             DWORD error) override;
+  void OnIOCompleted(base::MessagePumpForIO::IOContext* context,
+                     DWORD bytes_transferred,
+                     DWORD error) override;
 
   // IPC::Listener implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
-  virtual void OnChannelConnected(int32 peer_pid) override;
-  virtual void OnChannelError() override;
+  bool OnMessageReceived(const IPC::Message& message) override;
+  void OnChannelConnected(int32 peer_pid) override;
+  void OnChannelError() override;
 
   // The actual implementation of LaunchProcess()
   void DoLaunchProcess();