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

android_webview/native/aw_contents_io_thread_client_impl.cc

 // Copyright (c) 2012 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.
 
 #include "android_webview/native/aw_contents_io_thread_client_impl.h"
 
 #include <map>
 #include <utility>
 
 #include "android_webview/common/devtools_instrumentation.h"
@@ skipping 98 matching lines @@
   rfh_to_io_thread_client_.erase(rfh_id);
 }
 
 // ClientMapEntryUpdater ------------------------------------------------------
 
 class ClientMapEntryUpdater : public content::WebContentsObserver {
  public:
   ClientMapEntryUpdater(JNIEnv* env, WebContents* web_contents,
                         jobject jdelegate);
 
-  virtual void RenderFrameCreated(RenderFrameHost* render_frame_host) override;
-  virtual void RenderFrameDeleted(RenderFrameHost* render_frame_host) override;
-  virtual void WebContentsDestroyed() override;
+  void RenderFrameCreated(RenderFrameHost* render_frame_host) override;
+  void RenderFrameDeleted(RenderFrameHost* render_frame_host) override;
+  void WebContentsDestroyed() override;
 
  private:
   JavaObjectWeakGlobalRef jdelegate_;
 };
 
 ClientMapEntryUpdater::ClientMapEntryUpdater(JNIEnv* env,
                                              WebContents* web_contents,
                                              jobject jdelegate)
     : content::WebContentsObserver(web_contents),
       jdelegate_(env, jdelegate) {
@@ skipping 241 matching lines @@
 
   Java_AwContentsIoThreadClient_newLoginRequest(
       env, java_object_.obj(), jrealm.obj(), jaccount.obj(), jargs.obj());
 }
 
 bool RegisterAwContentsIoThreadClientImpl(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 } // namespace android_webview