Re-land reverted r269593; it was a red herring for ash_unittests

ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h

Index: ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h
diff --git a/ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h b/ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h
index 34f2783a73fb34c0b661952945e0cb54e0d481bf..cf3665ecac6c8d968340e85121419cf6570c0bbd 100644
--- a/ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h
+++ b/ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h
@@ -91,6 +91,9 @@ class X11WholeScreenMoveLoop : public ui::PlatformEventDispatcher {
   // pressing escape).
   bool canceled_;
 
+  // Keeps track of whether we still have a pointer grab at the end of the loop.
+  bool has_grab_;
+
   // A Widget is created during the drag if there is an image available to be
   // used during the drag.
   scoped_ptr<Widget> drag_widget_;