Disable touch calibration on external touchscreen.

ui/aura/root_window.h

Index: ui/aura/root_window.h
diff --git a/ui/aura/root_window.h b/ui/aura/root_window.h
index d5066921deee501d26f09b78dd0318b72e772c95..6e7a99d1081183d57cb7de730695bbae3dda7f39 100644
--- a/ui/aura/root_window.h
+++ b/ui/aura/root_window.h
@@ -63,10 +63,13 @@ class AURA_EXPORT RootWindow : public ui::CompositorDelegate,
  public:
   struct AURA_EXPORT CreateParams {
     // CreateParams with initial_bounds and default host.
-    explicit CreateParams(const gfx::Rect& initial_bounds);
+    explicit CreateParams(const gfx::Rect& initial_bounds,
+                          bool is_internal_display);

[oshima, 2013/02/04 19:20:05]

internal display <-> root window mapping is dynamic
(it changes when you swap display), so this doesn't work.

Let me take a look and get back to you about better approach.

[ynovikov, 2013/03/13 23:34:21]

Done.

     ~CreateParams() {}
 
     gfx::Rect initial_bounds;
+    // True if RootWindow corresponds to an internal display (on ChromeOS).
+    bool is_internal_display;
 
     // A host to use in place of the default one that RootWindow will create.
     // NULL by default.