Fix rtl shelf overflow bubble

ash/test/overflow_bubble_view_test_api.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/test/overflow_bubble_view_test_api.h"
 
 #include "ash/shelf/overflow_bubble_view.h"
 
 namespace ash {
 namespace test {
 
 OverflowBubbleViewTestAPI::OverflowBubbleViewTestAPI(
     OverflowBubbleView* bubble_view)
     : bubble_view_(bubble_view) {}
 
 OverflowBubbleViewTestAPI::~OverflowBubbleViewTestAPI() {
 }
 
 gfx::Size OverflowBubbleViewTestAPI::GetContentsSize() {
   return bubble_view_->GetContentsSize();
 }
 
 void OverflowBubbleViewTestAPI::ScrollByXOffset(int x_offset) {
   bubble_view_->ScrollByXOffset(x_offset);
   bubble_view_->Layout();
 }
 
+views::BubbleFrameView* OverflowBubbleViewTestAPI::GetBubbleFrameView() {
+  return bubble_view_->GetBubbleFrameView();
+}
+
 }  // namespace test
 }  // namespace ash