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

content/child/web_url_loader_impl.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_CHILD_WEB_URL_LOADER_IMPL_H_
 #define CONTENT_CHILD_WEB_URL_LOADER_IMPL_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
@@ skipping 20 matching lines @@
   GURL stream_url;
   ResourceResponseHead response;
 };
 
 class CONTENT_EXPORT WebURLLoaderImpl
     : public NON_EXPORTED_BASE(blink::WebURLLoader) {
  public:
   explicit WebURLLoaderImpl(
       ResourceDispatcher* resource_dispatcher,
       scoped_refptr<base::SingleThreadTaskRunner> task_runner);
-  virtual ~WebURLLoaderImpl();
+  ~WebURLLoaderImpl() override;
 
   static void PopulateURLResponse(
       const GURL& url,
       const ResourceResponseInfo& info,
       blink::WebURLResponse* response);
 
   // WebURLLoader methods:
-  virtual void loadSynchronously(
+  void loadSynchronously(
       const blink::WebURLRequest& request,
       blink::WebURLResponse& response,
       blink::WebURLError& error,
       blink::WebData& data) override;
-  virtual void loadAsynchronously(
+  void loadAsynchronously(
       const blink::WebURLRequest& request,
       blink::WebURLLoaderClient* client) override;
-  virtual void cancel() override;
-  virtual void setDefersLoading(bool value) override;
-  virtual void didChangePriority(blink::WebURLRequest::Priority new_priority,
-                                 int intra_priority_value) override;
-  virtual bool attachThreadedDataReceiver(
+  void cancel() override;
+  void setDefersLoading(bool value) override;
+  void didChangePriority(blink::WebURLRequest::Priority new_priority,
+                         int intra_priority_value) override;
+  bool attachThreadedDataReceiver(
       blink::WebThreadedDataReceiver* threaded_data_receiver) override;
 
  private:
   class Context;
   scoped_refptr<Context> context_;
 
   DISALLOW_COPY_AND_ASSIGN(WebURLLoaderImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEB_URL_LOADER_IMPL_H_