Allow the cursor to warp even when a window is dragged

ash/ui_controls_ash.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 "ash/shell.h"
 #include "ash/shell_factory.h"
+#include "ash/wm/coordinate_conversion.h"
 #include "ash/wm/window_properties.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/ui_controls_aura.h"
 #include "ui/gfx/screen.h"
 #include "ui/ui_controls/ui_controls_aura.h"
 
 namespace ash {
 namespace internal {
 namespace {
 
 // Returns the UIControls object for RootWindow.
 // kUIControlsKey is owned property and UIControls object
 // will be deleted when the root window is deleted.
 ui_controls::UIControlsAura* GetUIControlsForRootWindow(
     aura::RootWindow* root_window) {
   ui_controls::UIControlsAura* native_ui_control =
       root_window->GetProperty(kUIControlsKey);
   if (!native_ui_control) {
     native_ui_control = aura::CreateUIControlsAura(root_window);
     // Pass the ownership to the |root_window|.
     root_window->SetProperty(kUIControlsKey, native_ui_control);
   }
   return native_ui_control;
 }
 
 // Returns the UIControls object for the RootWindow at the |point| in
 // absolute screen coordinates.  NULL if there is no RootWindow under the
 // |point|.
 ui_controls::UIControlsAura* GetUIControlsAt(const gfx::Point& point) {
-  aura::RootWindow* root = Shell::GetRootWindowAt(point);
+  aura::RootWindow* root = wm::GetRootWindowAt(point);
   return root ? GetUIControlsForRootWindow(root) : NULL;
 }
 
 }  // namespace
 
 class UIControlsAsh : public ui_controls::UIControlsAura {
  public:
   UIControlsAsh() {
   }
   virtual ~UIControlsAsh() {
@@ skipping 75 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(UIControlsAsh);
 };
 
 ui_controls::UIControlsAura* CreateUIControls() {
   return new UIControlsAsh();
 }
 
 }  // namespace internal
 }  // namespace ash