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

android_webview/native/aw_media_url_interceptor.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 ANDROID_WEBVIEW_NATIVE_AW_MEDIA_URL_INTERCEPTOR_H_
 #define ANDROID_WEBVIEW_NATIVE_AW_MEDIA_URL_INTERCEPTOR_H_
 
 #include <string>
 
 #include "base/android/jni_android.h"
 #include "media/base/android/media_url_interceptor.h"
 
 namespace android_webview {
 
 // Interceptor to handle urls for media assets in the apk.
 class AwMediaUrlInterceptor : public media::MediaUrlInterceptor {
  public:
-  virtual bool Intercept(const std::string& url,
-                         int* fd,
-                         int64* offset,
-                         int64* size) const override;
+  bool Intercept(const std::string& url,
+                 int* fd,
+                 int64* offset,
+                 int64* size) const override;
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_NATIVE_AW_MEDIA_URL_INTERCEPTOR_H_