Fix rtl shelf overflow bubble

ash/test/overflow_bubble_view_test_api.h

Index: ash/test/overflow_bubble_view_test_api.h
diff --git a/ash/test/overflow_bubble_view_test_api.h b/ash/test/overflow_bubble_view_test_api.h
index 9c913277ed3022c1e31a1f3f8e9c1082f459d696..a7869c02433c79e3aec19ffb7a132a2de9f60de9 100644
--- a/ash/test/overflow_bubble_view_test_api.h
+++ b/ash/test/overflow_bubble_view_test_api.h
@@ -11,6 +11,10 @@ namespace gfx {
 class Size;
 }
 
+namespace views {
+class BubbleFrameView;
+}
+
 namespace ash {
 class OverflowBubbleView;
 
@@ -28,6 +32,9 @@ class OverflowBubbleViewTestAPI {
   // visible.
   void ScrollByXOffset(int x_offset);
 
+  // Returns the NonClientFrameView for the bubble.
+  views::BubbleFrameView* GetBubbleFrameView();
+
  private:
   OverflowBubbleView* bubble_view_;