[MD] Don't allow overflowing location icons to appear on top of toolbar

chrome/browser/ui/views/dropdown_bar_host.cc

Index: chrome/browser/ui/views/dropdown_bar_host.cc
diff --git a/chrome/browser/ui/views/dropdown_bar_host.cc b/chrome/browser/ui/views/dropdown_bar_host.cc
index 89d976a7b98772c56af9ab03c02aef12903e13dc..9d5ca25a5dafa162f069263e368b827dd82773ce 100644
--- a/chrome/browser/ui/views/dropdown_bar_host.cc
+++ b/chrome/browser/ui/views/dropdown_bar_host.cc
@@ -42,7 +42,7 @@ void DropdownBarHost::Init(views::View* host_view,
   delegate_ = delegate;
 
   // The |clip_view| exists to paint to a layer so that it can clip descendent
-  // Views which also paint to a Layer.
+  // Views which also paint to a Layer. See http://crbug.com/589497
   scoped_ptr<views::View> clip_view(new views::View());
   clip_view->SetPaintToLayer(true);
   clip_view->SetFillsBoundsOpaquely(false);