[gnome-shell] overviewControls: fix math for translations when sliding in

[Cosimo Cecchi <cosimoc src gnome org>]

commit 4505c38b5882cd867d661ff7aeb3a54830652d7f
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Feb 18 01:24:40 2013 -0500

    overviewControls: fix math for translations when sliding in
    
    The math to compute translations was wrong when sliding in; also, don't
    depend on the slide value for the translation anymore.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=694064

 js/ui/overviewControls.js |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index f1e0687..f965020 100644
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -125,14 +125,12 @@ const SlidingControl = new Lang.Class({
     _getTranslation: function() {
         let child = this.actor.get_first_child();
         let direction = getRtlSlideDirection(this.layout.slideDirection, child);
-
-        let slide = this.getSlide();
         let visibleWidth = this.getVisibleWidth();
 
         if (direction == SlideDirection.LEFT)
-            return ((slide - 1) * visibleWidth);
+            return - visibleWidth;
         else
-            return ((1 - slide) * visibleWidth);
+            return visibleWidth;
     },
 
     _updateTranslation: function(slidingIn) {