Use native coordinates to warp the cursor to another display.

ash/host/ash_window_tree_host.h

 // Copyright 2014 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_HOST_ASH_WINDOW_TREE_HOST_H_
 #define ASH_HOST_ASH_WINDOW_TREE_HOST_H_
 
 #include "ash/ash_export.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace aura {
 class Window;
 class WindowTreeHost;
 }
 
 namespace gfx {
+class Insets;
 class Rect;
 }
 
 namespace ash {
 class RootWindowTransformer;
 
 class ASH_EXPORT AshWindowTreeHost {
  public:
   // Creates a new AshWindowTreeHost. The caller owns the returned value.
   static AshWindowTreeHost* Create(const gfx::Rect& initial_bounds);
 
   virtual ~AshWindowTreeHost() {}
 
   // Toggles the host's full screen state.
   virtual void ToggleFullScreen() = 0;
 
   // Clips the cursor to the bounds of the root window until UnConfineCursor().
   // We would like to be able to confine the cursor to that window. However,
   // currently, we do not have such functionality in X. So we just confine
   // to the root window. This is ok because this option is currently only
   // being used in fullscreen mode, so root_window bounds = window bounds.
   virtual bool ConfineCursorToRootWindow() = 0;
   virtual void UnConfineCursor() = 0;
 
   virtual void SetRootWindowTransformer(
       scoped_ptr<RootWindowTransformer> transformer) = 0;
 
+  virtual gfx::Insets GetHostInsets() const = 0;
+
   virtual aura::WindowTreeHost* AsWindowTreeHost() = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_HOST_ASH_WINDOW_TREE_HOST_H_