Cancel drag if display configuration changes.

ui/aura/root_window_host_win.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 UI_AURA_ROOT_WINDOW_HOST_WIN_H_
 #define UI_AURA_ROOT_WINDOW_HOST_WIN_H_
 
 #include "base/compiler_specific.h"
 #include "ui/aura/root_window_host.h"
 #include "ui/base/win/window_impl.h"
@@ skipping 26 matching lines @@
   virtual bool QueryMouseLocation(gfx::Point* location_return) OVERRIDE;
   virtual bool ConfineCursorToRootWindow() OVERRIDE;
   virtual void UnConfineCursor() OVERRIDE;
   virtual void MoveCursorTo(const gfx::Point& location) OVERRIDE;
   virtual void SetFocusWhenShown(bool focus_when_shown) OVERRIDE;
   virtual bool GrabSnapshot(
       const gfx::Rect& snapshot_bounds,
       std::vector<unsigned char>* png_representation) OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& native_event) OVERRIDE;
   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
+  virtual void PrepareForShutdown() OVERRIDE;
 
  private:
   BEGIN_MSG_MAP_EX(RootWindowHostWin)
     // Range handlers must go first!
     MESSAGE_RANGE_HANDLER_EX(WM_MOUSEFIRST, WM_MOUSELAST, OnMouseRange)
     MESSAGE_RANGE_HANDLER_EX(WM_NCMOUSEMOVE, WM_NCXBUTTONDBLCLK, OnMouseRange)
 
     // Mouse capture events.
     MESSAGE_HANDLER_EX(WM_CAPTURECHANGED, OnCaptureChanged)
 
@@ skipping 27 matching lines @@
   DWORD saved_window_ex_style_;
 
   scoped_ptr<ui::ViewProp> prop_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindowHostWin);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_HOST_WIN_H_