[gnome-shell] Fix Chrome group not to interfere with drag-and-drop

[Owen Taylor <otaylor src gnome org>]

commit 0c7b983b107d9e32c3ab6f77660117f64219afec
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Sat May 23 10:47:13 2009 -0400

    Fix Chrome group not to interfere with drag-and-drop
    
    Drag and drop was not working since the (non-reactive, invisible)
    chrome group was on top of most of the screen. Explicitly set
    a 0x0 size on that group to resolve the problem.
---
 js/ui/chrome.js |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/js/ui/chrome.js b/js/ui/chrome.js
index a49842b..7a50c29 100644
--- a/js/ui/chrome.js
+++ b/js/ui/chrome.js
@@ -20,7 +20,8 @@ Chrome.prototype = {
     _init: function() {
         let global = Shell.Global.get();
 
-        this.actor = new Clutter.Group();
+        // The group itself has zero size so it doesn't interfere with DND
+        this.actor = new Clutter.Group({ width: 0, height: 0 });
         global.stage.add_actor(this.actor);
         this.nonOverlayActor = new Clutter.Group();
         this.actor.add_actor(this.nonOverlayActor);