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

content/browser/android/overscroll_controller_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_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_
 #define CONTENT_BROWSER_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_
 
 #include "base/time/time.h"
 #include "content/browser/android/overscroll_glow.h"
 #include "content/browser/android/overscroll_refresh.h"
@@ skipping 21 matching lines @@
 // Glue class for handling all inputs into Android-specific overscroll effects,
 // both the passive overscroll glow and the active overscroll pull-to-refresh.
 // Note that all input coordinates (both for events and overscroll) are in DIPs.
 class OverscrollControllerAndroid : public OverscrollGlowClient,
                                     public OverscrollRefreshClient,
                                     public WebContentsObserver {
  public:
   OverscrollControllerAndroid(WebContents* web_contents,
                               ui::WindowAndroidCompositor* compositor,
                               float dpi_scale);
-  virtual ~OverscrollControllerAndroid();
+  ~OverscrollControllerAndroid() override;
 
   // Returns true if |event| is consumed by an overscroll effect, in which
   // case it should cease propagation.
   bool WillHandleGestureEvent(const blink::WebGestureEvent& event);
 
   // To be called upon receipt of a gesture event ack.
   void OnGestureEventAck(const blink::WebGestureEvent& event,
                          InputEventAckState ack_result);
 
   // To be called upon receipt of an overscroll event.
@@ skipping 36 matching lines @@
   scoped_ptr<OverscrollRefresh> refresh_effect_;
   bool triggered_refresh_active_;
   bool is_fullscreen_;
 
   DISALLOW_COPY_AND_ASSIGN(OverscrollControllerAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_