Implement cursor compositing mode on Ash

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index 4d15cd3083da3d815489318c62031e64606d1e2c..8ad6d10742b67996d9bcffe22ee7cbc8d680122b 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -499,6 +499,13 @@ class ASH_EXPORT Shell
   internal::DisplayErrorObserver* display_error_observer() {
     return display_error_observer_.get();
   }
+
+  // Toggles cursor compositing on/off. Native cursor is disabled when cursor
+  // compositing is enabled, and vice versa.
+  void SetCursorCompositingEnabled(bool enabled);
+  bool is_cursor_compositing_enabled() const {
+    return is_cursor_compositing_enabled_;
+  }
 #endif  // defined(USE_X11)
 
   internal::ResolutionNotificationController*
@@ -698,6 +705,8 @@ class ASH_EXPORT Shell
 
   // Listens for output changes and updates the display manager.
   scoped_ptr<internal::DisplayChangeObserver> display_change_observer_;
+
+  bool is_cursor_compositing_enabled_;

[oshima, 2014/02/05 21:49:59]

can we simply use one in CursorWindowController?

[hshi1, 2014/02/05 22:55:58]

Done.

 #endif  // defined(USE_X11)
 #endif  // defined(OS_CHROMEOS)