Standardize usage of virtual/override/final in chrome/renderer/

chrome/renderer/chrome_mock_render_thread.h

Index: chrome/renderer/chrome_mock_render_thread.h
diff --git a/chrome/renderer/chrome_mock_render_thread.h b/chrome/renderer/chrome_mock_render_thread.h
index b17ef4da304235edbd26e298d18e473e5c4ceca1..ea3a1e9eb8382d5868deb9c2b08f177ca93c1376 100644
--- a/chrome/renderer/chrome_mock_render_thread.h
+++ b/chrome/renderer/chrome_mock_render_thread.h
@@ -28,11 +28,10 @@ struct PrintMsg_Print_Params;
 class ChromeMockRenderThread : public content::MockRenderThread {
  public:
   ChromeMockRenderThread();
-  virtual ~ChromeMockRenderThread();
+  ~ChromeMockRenderThread() override;
 
   // content::RenderThread overrides.
-  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy()
-      override;
+  scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() override;
 
   //////////////////////////////////////////////////////////////////////////
   // The following functions are called by the test itself.
@@ -59,7 +58,7 @@ class ChromeMockRenderThread : public content::MockRenderThread {
  private:
   // Overrides base class implementation to add custom handling for
   // print and extensions.
-  virtual bool OnMessageReceived(const IPC::Message& msg) override;
+  bool OnMessageReceived(const IPC::Message& msg) override;
 
 #if defined(ENABLE_EXTENSIONS)
   // The callee expects to be returned a valid channel_id.