Standardize usage of virtual/override/final in chrome/

chrome/app/chrome_main_delegate.h

Index: chrome/app/chrome_main_delegate.h
diff --git a/chrome/app/chrome_main_delegate.h b/chrome/app/chrome_main_delegate.h
index 08b7715e44c695b2e693c0f63387656b29524876..4b8bf5f36ea49eda12070b2f0029e70880e39f9e 100644
--- a/chrome/app/chrome_main_delegate.h
+++ b/chrome/app/chrome_main_delegate.h
@@ -21,23 +21,22 @@ class CommandLine;
 class ChromeMainDelegate : public content::ContentMainDelegate {
  public:
   ChromeMainDelegate();
-  virtual ~ChromeMainDelegate();
+  ~ChromeMainDelegate() override;
 
  protected:
   // content::ContentMainDelegate implementation:
-  virtual bool BasicStartupComplete(int* exit_code) override;
-  virtual void PreSandboxStartup() override;
-  virtual void SandboxInitialized(const std::string& process_type) override;
-  virtual int RunProcess(
+  bool BasicStartupComplete(int* exit_code) override;
+  void PreSandboxStartup() override;
+  void SandboxInitialized(const std::string& process_type) override;
+  int RunProcess(
       const std::string& process_type,
       const content::MainFunctionParams& main_function_params) override;
-  virtual void ProcessExiting(const std::string& process_type) override;
+  void ProcessExiting(const std::string& process_type) override;
 #if defined(OS_MACOSX)
-  virtual bool ProcessRegistersWithSystemProcess(
-      const std::string& process_type) override;
-  virtual bool ShouldSendMachPort(const std::string& process_type) override;
-  virtual bool DelaySandboxInitialization(
+  bool ProcessRegistersWithSystemProcess(
       const std::string& process_type) override;
+  bool ShouldSendMachPort(const std::string& process_type) override;
+  bool DelaySandboxInitialization(const std::string& process_type) override;
 #elif defined(OS_POSIX) && !defined(OS_ANDROID)
   virtual void ZygoteStarting(
       ScopedVector<content::ZygoteForkDelegate>* delegates) override;
@@ -46,11 +45,10 @@ class ChromeMainDelegate : public content::ContentMainDelegate {
   virtual bool ShouldEnableTerminationOnHeapCorruption() override;
 #endif
 
-  virtual content::ContentBrowserClient* CreateContentBrowserClient() override;
-  virtual content::ContentPluginClient* CreateContentPluginClient() override;
-  virtual content::ContentRendererClient*
-      CreateContentRendererClient() override;
-  virtual content::ContentUtilityClient* CreateContentUtilityClient() override;
+  content::ContentBrowserClient* CreateContentBrowserClient() override;
+  content::ContentPluginClient* CreateContentPluginClient() override;
+  content::ContentRendererClient* CreateContentRendererClient() override;
+  content::ContentUtilityClient* CreateContentUtilityClient() override;
 
 #if defined(OS_MACOSX)
   void InitMacCrashReporter(const base::CommandLine& command_line,