linux_aura: Fix crash on drags from the omnibox.

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index 2ffc6204be76c4a1e29e37c198d8a3696f7695f7..337012c053e51577a250b0161823ee86b9bc7226 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -1540,6 +1540,11 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
 
   DragController* drag_controller_;
 
+  // True while we're performing DoDrag(). On X11, we can have multiple mouse
+  // move events in our event queue when we start a drag, so we need a way to
+  // ignore events after the first one.
+  bool currently_dragging_;
+
   // Input  --------------------------------------------------------------------
 
   scoped_ptr<internal::PostEventDispatchHandler> post_dispatch_handler_;