Drag and drop between app list and launcher - First patch

ash/launcher/launcher_button_host.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_LAUNCHER_LAUNCHER_BUTTON_HOST_H_
 #define ASH_LAUNCHER_LAUNCHER_BUTTON_HOST_H_
 
 #include "ash/ash_export.h"
 #include "base/string16.h"
 
 namespace ui {
 class LocatedEvent;
 }
 
 namespace views {
 class View;
 }
 
 namespace ash {
 namespace internal {
 
 // The launcher buttons communicate back to the host by way of this interface.
 // This interface is used to enable reordering the items on the launcher.
 class ASH_EXPORT LauncherButtonHost {
  public:
   enum Pointer {
     NONE,
+    DRAG_AND_DROP,
     MOUSE,
     TOUCH,
   };
 
   // Invoked when a pointer device is pressed on a view.
   virtual void PointerPressedOnButton(views::View* view,
                                       Pointer pointer,
                                       const ui::LocatedEvent& event) = 0;
 
   // Invoked when a pointer device is dragged over a view.
@@ skipping 19 matching lines @@
   virtual base::string16 GetAccessibleName(const views::View* view) = 0;
 
  protected:
   virtual ~LauncherButtonHost() {}
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_LAUNCHER_LAUNCHER_BUTTON_HOST_H_