Bug 10939: Make image input element transparent

git-svn-id: svn://10.0.0.236/trunk@43138 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/layout/forms/nsImageControlFrame.cpp

@@ -211,6 +211,7 @@ nsImageControlFrame::Reflow(nsIPresContext&         aPresContext,
       // the view's size is not know yet, but its size will be kept in synch with our frame.
       nsRect boundBox(0, 0, 500, 500); 
       result = view->Init(viewMan, boundBox, parView, nsnull);
+      view->SetContentTransparency(PR_TRUE);
       viewMan->InsertChild(parView, view, 0);
       SetView(view);