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

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 645644f4279af87a2a3c216be1155838995cccca..13ae6a0d7dd28a10051d973e532811af5817ae17 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -3376,10 +3376,11 @@ void WebContentsImpl::SaveURL(const GURL& url,
     if (entry)
       post_id = entry->GetPostID();
   }
-  content::DownloadSaveInfo save_info;
-  save_info.prompt_for_save_location = true;
+  scoped_ptr<content::DownloadSaveInfo> save_info(
+      new content::DownloadSaveInfo());
+  save_info->prompt_for_save_location = true;
   scoped_ptr<DownloadUrlParameters> params(
-      DownloadUrlParameters::FromWebContents(this, url, save_info));
+      DownloadUrlParameters::FromWebContents(this, url, save_info.Pass()));
   params->set_referrer(referrer);
   params->set_post_id(post_id);
   params->set_prefer_cache(true);