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

CID=102975
TBR=ahendrickson@chromium.org
BUG=none
TEST=none

Review URL: http://codereview.chromium.org/9303013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@119966 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/download/download_resource_handler.cc

@@ -296,7 +296,7 @@ void DownloadResourceHandler::OnRequestClosed() {
 
 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

content/browser/download/download_resource_handler.h

@@ -101,7 +101,7 @@ class DownloadResourceHandler : public ResourceHandler {
 
   // 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_;