Update {virtual,override,final} to follow C++11 style.

chrome/browser/android/dev_tools_manager_delegate_android.h

 // Copyright 2014 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 CHROME_BROWSER_ANDROID_DEV_TOOLS_MANAGER_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_DEV_TOOLS_MANAGER_DELEGATE_ANDROID_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/devtools/devtools_network_protocol_handler.h"
 #include "content/public/browser/devtools_manager_delegate.h"
 
 class DevToolsManagerDelegateAndroid : public content::DevToolsManagerDelegate {
  public:
   DevToolsManagerDelegateAndroid();
-  virtual ~DevToolsManagerDelegateAndroid();
+  ~DevToolsManagerDelegateAndroid() override;
 
   // content::DevToolsManagerDelegate implementation.
-  virtual void Inspect(content::BrowserContext* browser_context,
-                       content::DevToolsAgentHost* agent_host) override;
-  virtual void DevToolsAgentStateChanged(content::DevToolsAgentHost* agent_host,
-                                         bool attached) override;
-  virtual base::DictionaryValue* HandleCommand(
+  void Inspect(content::BrowserContext* browser_context,
+               content::DevToolsAgentHost* agent_host) override;
+  void DevToolsAgentStateChanged(content::DevToolsAgentHost* agent_host,
+                                 bool attached) override;
+  base::DictionaryValue* HandleCommand(
       content::DevToolsAgentHost* agent_host,
       base::DictionaryValue* command_dict) override;
-  virtual scoped_ptr<content::DevToolsTarget> CreateNewTarget(
-      const GURL& url) override;
-  virtual void EnumerateTargets(TargetCallback callback) override;
-  virtual std::string GetPageThumbnailData(const GURL& url) override;
+  scoped_ptr<content::DevToolsTarget> CreateNewTarget(const GURL& url) override;
+  void EnumerateTargets(TargetCallback callback) override;
+  std::string GetPageThumbnailData(const GURL& url) override;
 
  private:
   scoped_ptr<DevToolsNetworkProtocolHandler> network_protocol_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsManagerDelegateAndroid);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_DEV_TOOLS_MANAGER_DELEGATE_ANDROID_H_