Standardize usage of virtual/override/final in content/

content/shell/browser/shell_devtools_frontend.h

 // Copyright 2013 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_BROWSER_SHELL_DEVTOOLS_FRONTEND_H_
 #define CONTENT_SHELL_BROWSER_SHELL_DEVTOOLS_FRONTEND_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
@@ skipping 16 matching lines @@
 
   void Activate();
   void Focus();
   void InspectElementAt(int x, int y);
   void Close();
 
   Shell* frontend_shell() const { return frontend_shell_; }
 
  protected:
   ShellDevToolsFrontend(Shell* frontend_shell, DevToolsAgentHost* agent_host);
-  virtual ~ShellDevToolsFrontend();
+  ~ShellDevToolsFrontend() override;
 
  private:
   // WebContentsObserver overrides
-  virtual void RenderViewCreated(RenderViewHost* render_view_host) override;
-  virtual void DocumentOnLoadCompletedInMainFrame() override;
-  virtual void WebContentsDestroyed() override;
+  void RenderViewCreated(RenderViewHost* render_view_host) override;
+  void DocumentOnLoadCompletedInMainFrame() override;
+  void WebContentsDestroyed() override;
 
   // content::DevToolsFrontendHost::Delegate implementation.
-  virtual void HandleMessageFromDevToolsFrontend(
-      const std::string& message) override;
-  virtual void HandleMessageFromDevToolsFrontendToBackend(
+  void HandleMessageFromDevToolsFrontend(const std::string& message) override;
+  void HandleMessageFromDevToolsFrontendToBackend(
       const std::string& message) override;
 
   // content::DevToolsAgentHostClient implementation.
-  virtual void DispatchProtocolMessage(
-      DevToolsAgentHost* agent_host, const std::string& message) override;
-  virtual void AgentHostClosed(
-      DevToolsAgentHost* agent_host, bool replaced) override;
+  void DispatchProtocolMessage(DevToolsAgentHost* agent_host,
+                               const std::string& message) override;
+  void AgentHostClosed(DevToolsAgentHost* agent_host, bool replaced) override;
 
   Shell* frontend_shell_;
   scoped_refptr<DevToolsAgentHost> agent_host_;
   scoped_ptr<DevToolsFrontendHost> frontend_host_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellDevToolsFrontend);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_BROWSER_SHELL_DEVTOOLS_FRONTEND_H_