Ensure that the focus ring in the bookmarks bar does not paint outside the parent view.

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index bfa107c7eb59451d32fd8c211537fb1c21eda3d0..8eeb95d7a42793c42eddca0e5f2de34422960547 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -1189,6 +1189,11 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // below layers owned by a view.
   virtual void ReorderChildLayers(ui::Layer* parent_layer);
 
+  // Notifies parents about the addition of a child layer. An example where a
+  // subclass may override this method is when it wants to clip the child by
+  // adding its own layer.
+  virtual void ChildLayerAdded() {}
+
   // Input ---------------------------------------------------------------------
 
   virtual DragInfo* GetDragInfo();