Avoids updating dock alignment when drag is cancelled

ash/wm/dock/docked_window_resizer.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 ASH_WM_DOCK_DOCK_WINDOW_RESIZER_H_
 #define ASH_WM_DOCK_DOCK_WINDOW_RESIZER_H_
 
 #include "ash/wm/dock/dock_types.h"
 #include "ash/wm/window_resizer.h"
 #include "base/compiler_specific.h"
@@ skipping 40 matching lines @@
 
   // If the provided window bounds should snap to the side of a screen,
   // returns the offset that gives the necessary adjustment to snap.
   void MaybeSnapToEdge(const gfx::Rect& bounds, gfx::Point* offset);
 
   // Tracks the window's initial position and attachment at the start of a drag
   // and informs the DockLayoutManager that a drag has started if necessary.
   void StartedDragging();
 
   // Informs the DockLayoutManager that the drag is complete if it was informed
-  // of the drag start.
-  void FinishedDragging();
+  // of the drag start. |move_result| specifies if the drag was completed or
+  // reverted.
+  void FinishedDragging(aura::client::WindowMoveResult move_result);
 
   // Reparents dragged window as necessary to the docked container or back to
   // workspace at the end of the drag. Calculates and returns action taken that
   // can be reported in UMA stats. |is_resized| reports if the window is merely
   // being resized rather than repositioned. |attached_panel| is necessary to
   // avoid docking panels that have been attached to the launcher shelf at the
   // end of the drag.
   DockedAction MaybeReparentWindowOnDragCompletion(bool is_resized,
                                                    bool is_attached_panel);
 
@@ skipping 21 matching lines @@
 
   base::WeakPtrFactory<DockedWindowResizer> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DockedWindowResizer);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_DOCK_DOCK_WINDOW_RESIZER_H_