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

android_webview/native/aw_http_auth_handler.h

 // 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.
 
 #ifndef ANDROID_WEBVIEW_NATIVE_AW_HTTP_AUTH_HANDLER_H_
 #define ANDROID_WEBVIEW_NATIVE_AW_HTTP_AUTH_HANDLER_H_
 
 #include <jni.h>
 #include <string>
 
@@ skipping 14 matching lines @@
 namespace android_webview {
 
 // Native class for Java class of same name and owns an instance
 // of that Java object.
 // One instance of this class is created per underlying AwLoginDelegate.
 class AwHttpAuthHandler : public AwHttpAuthHandlerBase {
  public:
   AwHttpAuthHandler(AwLoginDelegate* login_delegate,
                     net::AuthChallengeInfo* auth_info,
                     bool first_auth_attempt);
-  virtual ~AwHttpAuthHandler();
+  ~AwHttpAuthHandler() override;
 
   // from AwHttpAuthHandler
-  virtual bool HandleOnUIThread(content::WebContents* web_contents) override;
+  bool HandleOnUIThread(content::WebContents* web_contents) override;
 
   void Proceed(JNIEnv* env, jobject obj, jstring username, jstring password);
   void Cancel(JNIEnv* env, jobject obj);
 
  private:
   scoped_refptr<AwLoginDelegate> login_delegate_;
   base::android::ScopedJavaGlobalRef<jobject> http_auth_handler_;
   std::string host_;
   std::string realm_;
 };
 
 bool RegisterAwHttpAuthHandler(JNIEnv* env);
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_NATIVE_AW_HTTP_AUTH_HANDLER_H_