Aura: Add Window::MoveCursorTo() taking relative location to the window.

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 bf1918c6e1461dbab3cacf42a4c99586d1c4519d..ce694a8946979526ea772679d3e600c7eef5f277 100644
--- a/ui/aura/root_window.h
+++ b/ui/aura/root_window.h
@@ -100,6 +100,10 @@ class AURA_EXPORT RootWindow : public ui::CompositorDelegate,
     focus_manager_ = focus_manager;
   }
 
+#ifdef UNIT_TEST
+  RootWindowHost* host() { return host_.get(); }
+#endif
+
   // Initializes the root window.
   void Init();
 
@@ -126,7 +130,7 @@ class AURA_EXPORT RootWindow : public ui::CompositorDelegate,
   void ShowCursor(bool show);
 
   // Moves the cursor to the specified location relative to the root window.
-  void MoveCursorTo(const gfx::Point& location);
+  virtual void MoveCursorTo(const gfx::Point& location) OVERRIDE;
 
   // Clips the cursor movement to the root_window.
   bool ConfineCursorToWindow();