Simplify DisplayController::WarpMouseCursorIfNecessary using Virtual Screen Coordinates

ash/display/display_controller.h

Index: ash/display/display_controller.h
diff --git a/ash/display/display_controller.h b/ash/display/display_controller.h
index 189f2db67b9133a757f7f21bd62abf3cea283d6d..7a151fbfe1a0c12f72c40805f5a06e2265ef1512 100644
--- a/ash/display/display_controller.h
+++ b/ash/display/display_controller.h
@@ -69,12 +69,12 @@ class ASH_EXPORT DisplayController : public aura::DisplayObserver {
   void SetSecondaryDisplayLayout(SecondaryDisplayLayout layout);
 
   // Warps the mouse cursor to an alternate root window when the
-  // |location_in_root|, which is the location of the mouse cursor,
+  // |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::Window* root_window,
-                                  const gfx::Point& location_in_root);
+  bool WarpMouseCursorIfNecessary(aura::RootWindow* root_window,
+                                  const gfx::Point& point_in_root);
 
   // aura::DisplayObserver overrides:
   virtual void OnDisplayBoundsChanged(