Convert implicit scoped_refptr constructor calls to explicit ones, part 1

chrome/browser/cocoa/web_drag_source.mm

Index: chrome/browser/cocoa/web_drag_source.mm
diff --git a/chrome/browser/cocoa/web_drag_source.mm b/chrome/browser/cocoa/web_drag_source.mm
index a2402dabd3f81f56c87e78fa546adb5545ea7479..95ab0d1f8b233162e351860e65d77823663bcd86 100644
--- a/chrome/browser/cocoa/web_drag_source.mm
+++ b/chrome/browser/cocoa/web_drag_source.mm
@@ -307,13 +307,13 @@ void PromiseWriterTask::Run() {
 
   if (downloadURL_.is_valid()) {
     TabContents* tabContents = [contentsView_ tabContents];
-    scoped_refptr<DragDownloadFile> dragFileDownloader = new DragDownloadFile(
+    scoped_refptr<DragDownloadFile> dragFileDownloader(new DragDownloadFile(
         filePath,
         linked_ptr<net::FileStream>(fileStream),
         downloadURL_,
         tabContents->GetURL(),
         tabContents->encoding(),
-        tabContents);
+        tabContents));
 
     // The finalizer will take care of closing and deletion.
     dragFileDownloader->Start(