Disable touch calibration on external touchscreen.

ui/aura/root_window_host_linux.h

Index: ui/aura/root_window_host_linux.h
diff --git a/ui/aura/root_window_host_linux.h b/ui/aura/root_window_host_linux.h
index 3616922f1da36f42a739751b3b5827a7f1272e26..7dc75d648224b71d063b503887a91289d8cbdfb5 100644
--- a/ui/aura/root_window_host_linux.h
+++ b/ui/aura/root_window_host_linux.h
@@ -28,7 +28,7 @@ class MouseEvent;
 namespace aura {
 
 namespace internal {
-class TouchEventCalibrate;
+class TouchEventRouter;
 }
 
 class RootWindowHostLinux : public RootWindowHost,
@@ -137,7 +137,7 @@ class RootWindowHostLinux : public RootWindowHost,
 
   scoped_ptr<XID[]> pointer_barriers_;
 
-  scoped_ptr<internal::TouchEventCalibrate> touch_calibrate_;
+  scoped_ptr<internal::TouchEventRouter> touch_router_;
 
   scoped_ptr<MouseMoveFilter> mouse_move_filter_;