Cancel drag upon screen lock

ash/drag_drop/drag_drop_controller.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_DRAG_DROP_DRAG_DROP_CONTROLLER_H_
 #define ASH_DRAG_DROP_DRAG_DROP_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 16 matching lines @@
 
 namespace ash {
 
 namespace test {
 class DragDropControllerTest;
 }
 
 namespace internal {
 
 class DragDropTracker;
+class DragDropTrackerDelegate;
 class DragImageView;
 
 class ASH_EXPORT DragDropController
     : public aura::client::DragDropClient,
       public ui::EventHandler,
       public ui::AnimationDelegate,
       public aura::WindowObserver {
  public:
   DragDropController();
   virtual ~DragDropController();
@@ skipping 73 matching lines @@
   aura::Window* drag_source_window_;
 
   // Indicates whether the caller should be blocked on a drag/drop session.
   // Only be used for tests.
   bool should_block_during_drag_drop_;
 
   // Closure for quitting nested message loop.
   base::Closure quit_closure_;
 
   scoped_ptr<ash::internal::DragDropTracker> drag_drop_tracker_;
+  scoped_ptr<DragDropTrackerDelegate> drag_drop_window_delegate_;
 
   ui::DragDropTypes::DragEventSource current_drag_event_source_;
 
   // Holds a synthetic long tap event to be sent to the |drag_source_window_|.
   // See comment in OnGestureEvent() on why we need this.
   scoped_ptr<ui::GestureEvent> pending_long_tap_;
 
   base::WeakPtrFactory<DragDropController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DragDropController);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_DRAG_DROP_DRAG_DROP_CONTROLLER_H_