Allow the cursor to warp even when a window is dragged

ash/display/display_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_DISPLAY_DISPLAY_CONTROLLER_H_
 #define ASH_DISPLAY_DISPLAY_CONTROLLER_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 50 matching lines @@
 
   // Returns all oot window controllers. In non extended desktop
   // mode, this return a RootWindowController for the primary root window only.
   std::vector<internal::RootWindowController*> GetAllRootWindowControllers();
 
   SecondaryDisplayLayout secondary_display_layout() const {
     return secondary_display_layout_;
   }
   void SetSecondaryDisplayLayout(SecondaryDisplayLayout layout);
 
+  void set_dont_warp_mouse(bool dont_warp_mouse) {
+    dont_warp_mouse_ = dont_warp_mouse;
+  }
+
   // Warps the mouse cursor to an alternate root window when the
   // |point_in_root|, which is the location of the mouse cursor,
   // hits or exceeds the edge of the |root_window| and the mouse cursor
   // is considered to be in an alternate display. Returns true if
   // the cursor was moved.
   bool WarpMouseCursorIfNecessary(aura::RootWindow* root_window,
                                   const gfx::Point& point_in_root);
 
   // aura::DisplayObserver overrides:
   virtual void OnDisplayBoundsChanged(
       const gfx::Display& display) OVERRIDE;
   virtual void OnDisplayAdded(const gfx::Display& display) OVERRIDE;
   virtual void OnDisplayRemoved(const gfx::Display& display) OVERRIDE;
 
   // Is extended desktop enabled?
   static bool IsExtendedDesktopEnabled();
 
  private:
   // Creates a root window for |display| and stores it in the |root_windows_|
   // map.
   aura::RootWindow* AddRootWindowForDisplay(const gfx::Display& display);
 
   void UpdateDisplayBoundsForLayout();
 
   std::map<int, aura::RootWindow*> root_windows_;
 
   SecondaryDisplayLayout secondary_display_layout_;
 
+  // If true, the mouse pointer can't move from one display to another.
+  bool dont_warp_mouse_;
+
   DISALLOW_COPY_AND_ASSIGN(DisplayController);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_DISPLAY_DISPLAY_CONTROLLER_H_