Shift passage of FileStream in downloads system to be by scoped_ptr<>.

chrome/browser/extensions/webstore_installer.cc

Index: chrome/browser/extensions/webstore_installer.cc
diff --git a/chrome/browser/extensions/webstore_installer.cc b/chrome/browser/extensions/webstore_installer.cc
index 8b80979f052812f50953ee08585abf267ec46be0..97ff77e18cf712d0f0ca97b935b553860fd7a3ea 100644
--- a/chrome/browser/extensions/webstore_installer.cc
+++ b/chrome/browser/extensions/webstore_installer.cc
@@ -353,8 +353,9 @@ void WebstoreInstaller::StartDownload(const FilePath& file) {
     return;
   }
 
-  content::DownloadSaveInfo save_info;
-  save_info.file_path = file;
+  scoped_ptr<content::DownloadSaveInfo> save_info(
+      new content::DownloadSaveInfo());
+  save_info->file_path = file;
 
   // The download url for the given extension is contained in |download_url_|.
   // We will navigate the current tab to this url to start the download. The
@@ -363,7 +364,7 @@ void WebstoreInstaller::StartDownload(const FilePath& file) {
       download_util::INITIATED_BY_WEBSTORE_INSTALLER);
   scoped_ptr<DownloadUrlParameters> params(
       DownloadUrlParameters::FromWebContents(
-          controller_->GetWebContents(), download_url_, save_info));
+          controller_->GetWebContents(), download_url_, save_info.Pass()));
   if (controller_->GetActiveEntry())
     params->set_referrer(
         content::Referrer(controller_->GetActiveEntry()->GetURL(),