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

content/browser/screen_orientation/screen_orientation_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 CONTENT_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_DELEGATE_H_
 #define CONTENT_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_DELEGATE_H_
 
 #include <jni.h>
 
 #include "base/macros.h"
 #include "content/public/browser/screen_orientation_delegate.h"
 #include "third_party/WebKit/public/platform/WebScreenOrientationLockType.h"
 
 namespace content {
 
 class WebContents;
 
 // Android implementation of ScreenOrientationDelegate. The functionality of
 // ScreenOrientationProvider is always supported.
 class ScreenOrientationDelegateAndroid : public ScreenOrientationDelegate {
  public:
   ScreenOrientationDelegateAndroid();
-  virtual ~ScreenOrientationDelegateAndroid();
+  ~ScreenOrientationDelegateAndroid() override;
 
   static bool Register(JNIEnv* env);
 
   // Ask the ScreenOrientationListener (Java) to start accurately listening to
   // the screen orientation. It keep track of the number of start request if it
   // is already running an accurate listening.
   static void StartAccurateListening();
 
   // Ask the ScreenOrientationListener (Java) to stop accurately listening to
   // the screen orientation. It will actually stop only if the number of stop
   // requests matches the number of start requests.
   static void StopAccurateListening();
 
   // ScreenOrientationDelegate:
   bool FullScreenRequired(WebContents* web_contents) override;
   void Lock(WebContents* web_contents,
             blink::WebScreenOrientationLockType lock_orientation) override;
   bool ScreenOrientationProviderSupported() override;
   void Unlock(WebContents* web_contents) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScreenOrientationDelegateAndroid);
 };
 
 } // namespace content
 
 #endif // CONTENT_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_DELEGATE_H_