Centered flood fill style ink drop ripples on mouse/touch points.

ash/shelf/shelf_button.h

 // 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.
 
 #ifndef ASH_SHELF_SHELF_BUTTON_H_
 #define ASH_SHELF_SHELF_BUTTON_H_
 
 #include "ash/ash_export.h"
 #include "base/macros.h"
 #include "ui/gfx/shadow_value.h"
@@ skipping 38 matching lines @@
 
   // |state| is or'd into the current state.
   void AddState(State state);
   void ClearState(State state);
   int state() const { return state_; }
 
   // Returns the bounds of the icon.
   gfx::Rect GetIconBounds() const;
 
   // Called when user started dragging the shelf button.
-  void OnDragStarted();
+  void OnDragStarted(const ui::LocatedEvent* event);
 
   // Overrides to views::CustomButton:
   void ShowContextMenu(const gfx::Point& p,
                        ui::MenuSourceType source_type) override;
 
   // View override - needed by unit test.
   void OnMouseCaptureLost() override;
 
  protected:
   // View overrides:
@@ skipping 49 matching lines @@
   // If non-null the destuctor sets this to true. This is set while the menu is
   // showing and used to detect if the menu was deleted while running.
   bool* destroyed_flag_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfButton);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_BUTTON_H_