Enable mash shelf tooltips.

ash/test/shelf_view_test_api.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 ASH_TEST_SHELF_VIEW_TEST_API_H_
 #define ASH_TEST_SHELF_VIEW_TEST_API_H_
 
 #include "ash/shelf/shelf_item_delegate.h"
 #include "ash/shelf/shelf_item_types.h"
 #include "base/macros.h"
 
 namespace gfx {
 class Rect;
 class Size;
 }
 
 namespace ui {
 class Event;
 }
 
 namespace views {
 class Button;
 }
 
 namespace ash {
 class OverflowBubble;
 class ShelfButton;
 class ShelfButtonPressedMetricTracker;
 class ShelfDelegate;
+class ShelfTooltipManager;
 class ShelfView;
 
 namespace test {
 
 // Use the api in this class to test ShelfView.
 class ShelfViewTestAPI {
  public:
   explicit ShelfViewTestAPI(ShelfView* shelf_view);
   ~ShelfViewTestAPI();
 
@@ skipping 21 matching lines @@
 
   // Sets animation duration in milliseconds for test.
   void SetAnimationDuration(int duration_ms);
 
   // Runs message loop and waits until all add/remove animations are done.
   void RunMessageLoopUntilAnimationsDone();
 
   // An accessor for |shelf_view|.
   ShelfView* shelf_view() { return shelf_view_; }
 
+  // An accessor for the shelf tooltip manager.
+  ShelfTooltipManager* tooltip_manager();
+
   // An accessor for overflow bubble.
   OverflowBubble* overflow_bubble();
 
   // Returns the preferred size of |shelf_view_|.
   gfx::Size GetPreferredSize();
 
   // Returns the button size.
   int GetButtonSize();
 
   // Returns the button space size.
@@ skipping 23 matching lines @@
  private:
   ShelfView* shelf_view_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfViewTestAPI);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_SHELF_VIEW_TEST_API_H_