Cleanup: Fix content header include guards.

content/browser/fileapi/mock_url_request_delegate.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_BROWSER_FILEAPI_MOCK_URL_REQUEST_DELEGATE_H
-#define CONTENT_BROWSER_FILEAPI_MOCK_URL_REQUEST_DELEGATE_H
+#ifndef CONTENT_BROWSER_FILEAPI_MOCK_URL_REQUEST_DELEGATE_H_
+#define CONTENT_BROWSER_FILEAPI_MOCK_URL_REQUEST_DELEGATE_H_
 
 #include "net/url_request/url_request.h"
 
 namespace net {
 class IOBuffer;
 }
 
 namespace content {
 
 // A URL request delegate that receives the response body.
@@ skipping 10 matching lines @@
   void ReadSome(net::URLRequest* request);
   void ReceiveData(net::URLRequest* request, int bytes_read);
   void RequestComplete();
 
   scoped_refptr<net::IOBuffer> io_buffer_;
   std::string response_data_;
 };
 
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_FILEAPI_MOCK_URL_REQUEST_DELEGATE_H
+#endif  // CONTENT_BROWSER_FILEAPI_MOCK_URL_REQUEST_DELEGATE_H_