Standardize usage of virtual/override/final specifiers.

remoting/host/desktop_resizer_linux.cc

Index: remoting/host/desktop_resizer_linux.cc
diff --git a/remoting/host/desktop_resizer_linux.cc b/remoting/host/desktop_resizer_linux.cc
index f28c1c639b131ec2a91c481655c0789004b7a539..13ce6a7179a53b3b4dff7237d3cef61e1a2e6a30 100644
--- a/remoting/host/desktop_resizer_linux.cc
+++ b/remoting/host/desktop_resizer_linux.cc
@@ -124,14 +124,14 @@ class ScreenResources {
 class DesktopResizerLinux : public DesktopResizer {
  public:
   DesktopResizerLinux();
-  virtual ~DesktopResizerLinux();
+  ~DesktopResizerLinux() 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:
   // Create a mode, and attach it to the primary output. If the mode already