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

components/cronet/android/url_request_adapter.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 COMPONENTS_CRONET_ANDROID_URL_REQUEST_ADAPTER_H_
 #define COMPONENTS_CRONET_ANDROID_URL_REQUEST_ADAPTER_H_
 
 #include <jni.h>
 
 #include <string>
@@ skipping 31 matching lines @@
 
    protected:
     friend class base::RefCountedThreadSafe<URLRequestAdapterDelegate>;
     virtual ~URLRequestAdapterDelegate() {}
   };
 
   URLRequestAdapter(URLRequestContextAdapter* context,
                     URLRequestAdapterDelegate* delegate,
                     GURL url,
                     net::RequestPriority priority);
-  virtual ~URLRequestAdapter();
+  ~URLRequestAdapter() override;
 
   // Sets the request method GET, POST etc
   void SetMethod(const std::string& method);
 
   // Adds a header to the request
   void AddHeader(const std::string& name, const std::string& value);
 
   // Sets the contents of the POST or PUT request
   void SetUploadContent(const char* bytes, int bytes_len);
 
@@ skipping 100 matching lines @@
   bool chunked_upload_;
   // Indicates whether redirect has been disabled.
   bool disable_redirect_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestAdapter);
 };
 
 }  // namespace cronet
 
 #endif  // COMPONENTS_CRONET_ANDROID_URL_REQUEST_ADAPTER_H_