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

content/browser/download/download_resource_handler.cc

 // 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.
 
 #include "content/browser/download/download_resource_handler.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 278 matching lines @@
   return true;
 }
 
 void DownloadResourceHandler::OnRequestClosed() {
   UMA_HISTOGRAM_TIMES("SB2.DownloadDuration",
                       base::TimeTicks::Now() - download_start_time_);
 }
 
 void DownloadResourceHandler::StartOnUIThread(
     scoped_ptr<DownloadCreateInfo> info,
-    DownloadRequestHandle handle) {
+    const DownloadRequestHandle& handle) {
   DownloadManager* download_manager = handle.GetDownloadManager();
   if (!download_manager) {
     // NULL in unittests or if the page closed right after starting the
     // download.
     return;
   }
   info->download_id = download_manager->delegate()->GetNextId();
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&DownloadResourceHandler::set_download_id, this,
@@ skipping 65 matching lines @@
                             " render_view_id_ = " "%d"
                             " save_info_.file_path = \"%" PRFilePath "\""
                             " }",
                             request_->url().spec().c_str(),
                             download_id_.local(),
                             global_id_.child_id,
                             global_id_.request_id,
                             render_view_id_,
                             save_info_.file_path.value().c_str());
 }