Implement the 2016Q2 Translate UI designe spec out in

ui/views/bubble/bubble_frame_view.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_VIEWS_BUBBLE_BUBBLE_FRAME_VIEW_H_
 #define UI_VIEWS_BUBBLE_BUBBLE_FRAME_VIEW_H_
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
@@ skipping 67 matching lines @@
 
   // Given the size of the contents and the rect to point at, returns the bounds
   // of the bubble window. The bubble's arrow location may change if the bubble
   // does not fit on the monitor and |adjust_if_offscreen| is true.
   gfx::Rect GetUpdatedWindowBounds(const gfx::Rect& anchor_rect,
                                    gfx::Size client_size,
                                    bool adjust_if_offscreen);
 
   bool close_button_clicked() const { return close_button_clicked_; }
 
+  LabelButton* GetCloseButtonForTest() { return close_; }
+
  protected:
   // Returns the available screen bounds if the frame were to show in |rect|.
   virtual gfx::Rect GetAvailableScreenBounds(const gfx::Rect& rect) const;
 
   bool IsCloseButtonVisible() const;
   gfx::Rect GetCloseButtonMirroredBounds() const;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(BubbleFrameViewTest, GetBoundsForClientView);
   FRIEND_TEST_ALL_PREFIXES(BubbleDelegateTest, CloseReasons);
@@ skipping 32 matching lines @@
 
   // Whether the close button was clicked.
   bool close_button_clicked_;
 
   DISALLOW_COPY_AND_ASSIGN(BubbleFrameView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_BUBBLE_BUBBLE_FRAME_VIEW_H_