Cancel drag if display configuration changes.

ui/views/widget/desktop_root_window_host_win.cc

 // 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.
 
 #include "ui/views/widget/desktop_root_window_host_win.h"
 
 #include "ui/aura/root_window.h"
 #include "ui/views/win/hwnd_message_handler.h"
 
 namespace views {
@@ skipping 103 matching lines @@
 }
 
 void DesktopRootWindowHostWin::PostNativeEvent(
     const base::NativeEvent& native_event) {
 }
 
 void DesktopRootWindowHostWin::OnDeviceScaleFactorChanged(
     float device_scale_factor) {
 }
 
+void DesktopRootWindowHostWin::PrepareForShutdown() {
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopRootWindowHostWin, HWNDMessageHandlerDelegate implementation:
 
 bool DesktopRootWindowHostWin::IsWidgetWindow() const {
   return true;
 }
 
 bool DesktopRootWindowHostWin::IsUsingCustomFrame() const {
   return true;
 }
@@ skipping 230 matching lines @@
 // DesktopRootWindowHost, public:
 
 // static
 DesktopRootWindowHost* DesktopRootWindowHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     const gfx::Rect& initial_bounds) {
   return new DesktopRootWindowHostWin(native_widget_delegate, initial_bounds);
 }
 
 }  // namespace views