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

remoting/host/desktop_resizer_win.cc

Index: remoting/host/desktop_resizer_win.cc
diff --git a/remoting/host/desktop_resizer_win.cc b/remoting/host/desktop_resizer_win.cc
index f35b39f539f8ba4933359181c9a7f5253cd8563b..de2fd37653901093ed3327dd3bc3401fc00c5968 100644
--- a/remoting/host/desktop_resizer_win.cc
+++ b/remoting/host/desktop_resizer_win.cc
@@ -32,14 +32,14 @@ static inline bool operator <(const ScreenResolution& a,
 class DesktopResizerWin : public DesktopResizer {
  public:
   DesktopResizerWin();
-  virtual ~DesktopResizerWin();
+  ~DesktopResizerWin() override;
 
   // DesktopResizer interface.
-  virtual ScreenResolution GetCurrentResolution() override;
-  virtual std::list<ScreenResolution> GetSupportedResolutions(
+  ScreenResolution GetCurrentResolution() override;
+  std::list<ScreenResolution> GetSupportedResolutions(
       const ScreenResolution& preferred) override;
-  virtual void SetResolution(const ScreenResolution& resolution) override;
-  virtual void RestoreResolution(const ScreenResolution& original) override;
+  void SetResolution(const ScreenResolution& resolution) override;
+  void RestoreResolution(const ScreenResolution& original) override;
 
  private:
   static bool IsResizeSupported();