[Coverity] Changed pass-by-value to pass-by-ref

content/browser/download/download_resource_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 CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 83 matching lines @@
   std::string DebugString() const;
 
  private:
   virtual ~DownloadResourceHandler();
 
   void StartPauseTimer();
   void CallStartedCB(content::DownloadId id, net::Error error);
 
   // Generates a DownloadId and calls DownloadFileManager.
   void StartOnUIThread(scoped_ptr<DownloadCreateInfo> info,
-                       DownloadRequestHandle handle);
+                       const DownloadRequestHandle& handle);
   void set_download_id(content::DownloadId id);
 
   content::DownloadId download_id_;
   content::GlobalRequestID global_id_;
   int render_view_id_;
   scoped_refptr<net::IOBuffer> read_buffer_;
   std::string content_disposition_;
   int64 content_length_;
   DownloadFileManager* download_file_manager_;
   net::URLRequest* request_;
@@ skipping 12 matching lines @@
   int64 bytes_read_;
   std::string accept_ranges_;
 
   static const int kReadBufSize = 32768;  // bytes
   static const int kThrottleTimeMs = 200;  // milliseconds
 
   DISALLOW_COPY_AND_ASSIGN(DownloadResourceHandler);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_