Disable touch calibration on external touchscreen.

ash/host/root_window_host_factory.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_HOST_ROOT_WINDOW_HOST_FACTORY_H_
 #define ASH_HOST_ROOT_WINDOW_HOST_FACTORY_H_
 
 #include "ash/ash_export.h"
 #include "ui/gfx/rect.h"
 
 namespace aura {
 class RootWindowHost;
 }
 
 namespace ash {
 
 class ASH_EXPORT RootWindowHostFactory {
  public:
   virtual ~RootWindowHostFactory() {}
 
   static RootWindowHostFactory* Create();
 
   // Creates a new aura::RootWindowHost. The caller owns the returned value.
   virtual aura::RootWindowHost* CreateRootWindowHost(
-      const gfx::Rect& initial_bounds) = 0;
+      const gfx::Rect& initial_bounds,
+      bool is_internal_display) = 0;
 
  protected:
   RootWindowHostFactory() {}
 };
 
 }  // namespace ash
 
 #endif  // ASH_HOST_ROOT_WINDOW_HOST_FACTORY_H_