Dismiss the multi window resizer when the user clicks outside of the resizer

ash/wm/workspace/multi_window_resize_controller.h

Index: ash/wm/workspace/multi_window_resize_controller.h
diff --git a/ash/wm/workspace/multi_window_resize_controller.h b/ash/wm/workspace/multi_window_resize_controller.h
index d4b8f354c57965de64d979ec65f29facc5a8f325..0e387e8caa8a2806f3c855444b13ac7ea3558b87 100644
--- a/ash/wm/workspace/multi_window_resize_controller.h
+++ b/ash/wm/workspace/multi_window_resize_controller.h
@@ -140,6 +140,9 @@ class ASH_EXPORT MultiWindowResizeController :
   gfx::Rect CalculateResizeWidgetBounds(
       const gfx::Point& location_in_parent) const;
 
+  // Returns true if |location_in_screen| is over the resize widget.
+  bool IsOverResizeWidget(const gfx::Point& location_in_screen) const;
+
   // Returns true if |location_in_screen| is over the resize windows
   // (or the resize widget itself).
   bool IsOverWindows(const gfx::Point& location_in_screen) const;