Standardize usage of virtual/override/final specifiers.

content/shell/app/shell_main_delegate.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_SHELL_APP_SHELL_MAIN_DELEGATE_H_
 #define CONTENT_SHELL_APP_SHELL_MAIN_DELEGATE_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/app/content_main_delegate.h"
@@ skipping 11 matching lines @@
  public:
   ShellMainDelegate();
   ~ShellMainDelegate() override;
 
   // ContentMainDelegate implementation:
   bool BasicStartupComplete(int* exit_code) override;
   void PreSandboxStartup() override;
   int RunProcess(const std::string& process_type,
                  const MainFunctionParams& main_function_params) override;
 #if defined(OS_POSIX) && !defined(OS_ANDROID) && !defined(OS_MACOSX)
-  virtual void ZygoteForked() override;
+  void ZygoteForked() override;
 #endif
   ContentBrowserClient* CreateContentBrowserClient() override;
   ContentRendererClient* CreateContentRendererClient() override;
 
   static void InitializeResourceBundle();
 
  private:
   scoped_ptr<ShellContentBrowserClient> browser_client_;
   scoped_ptr<ShellContentRendererClient> renderer_client_;
   ShellContentClient content_client_;
 
 #if defined(OS_ANDROID)
   scoped_ptr<BrowserMainRunner> browser_runner_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ShellMainDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_APP_SHELL_MAIN_DELEGATE_H_