Disable touch calibration on external touchscreen.

ash/host/root_window_host_factory.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/host/root_window_host_factory.h"
 
 #include "ui/aura/root_window_host.h"
 
 namespace {
 
 class RootWindowHostFactoryImpl : public ash::RootWindowHostFactory {
  public:
   RootWindowHostFactoryImpl() {}
 
   // Overridden from RootWindowHostFactory:
   virtual aura::RootWindowHost* CreateRootWindowHost(
-      const gfx::Rect& initial_bounds) OVERRIDE {
-    return aura::RootWindowHost::Create(initial_bounds);
+      const gfx::Rect& initial_bounds,
+      bool is_internal_display) OVERRIDE {
+    return aura::RootWindowHost::Create(initial_bounds, is_internal_display);
   }
 };
 
 }
 
 namespace ash {
 
 // static
 RootWindowHostFactory* RootWindowHostFactory::Create() {
   return new RootWindowHostFactoryImpl;
 }
 
 }  // namespace ash