Consistent fading behavior for touch editing handles

ui/base/touch/touch_editing_controller.h

 // Copyright (c) 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.
 
 #ifndef UI_BASE_TOUCH_TOUCH_EDITING_CONTROLLER_H_
 #define UI_BASE_TOUCH_TOUCH_EDITING_CONTROLLER_H_
 
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/rect.h"
@@ skipping 56 matching lines @@
 
   // Creates a TouchSelectionController. Caller owns the returned object.
   static TouchSelectionController* create(
       TouchEditable* client_view);
 
   // Notifies the controller that the selection has changed.
   virtual void SelectionChanged() = 0;
 
   // Returns true if the user is currently dragging one of the handles.
   virtual bool IsHandleDragInProgress() = 0;
+
+  // Hides visible handles. According to the value of |quick|, handles might
+  // fade out quickly or slowly.
+  virtual void HideHandles(bool quick) = 0;
 };
 
 class UI_BASE_EXPORT TouchSelectionControllerFactory {
  public:
   static void SetInstance(TouchSelectionControllerFactory* instance);
 
   virtual TouchSelectionController* create(TouchEditable* client_view) = 0;
 
  protected:
   virtual ~TouchSelectionControllerFactory() {}
 };
 
 }  // namespace views
 
 #endif  // UI_BASE_TOUCH_TOUCH_EDITING_CONTROLLER_H_