[gnome-shell] windowManager: Small cleanup

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 1abfbb82c5b3c6fc3cad104059a4c122bbf6db60
Author: Florian Müllner <fmuellner gnome org>
Date:   Sun Jul 22 03:31:54 2018 +0200

    windowManager: Small cleanup
    
    We start with a dim factor of 0, so the syncEnabled() call in the
    constructor will always disable the effect. Just create the effect
    disabled and save the method call.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/654

 js/ui/windowManager.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/windowManager.js b/js/ui/windowManager.js
index 44774f095..04046b131 100644
--- a/js/ui/windowManager.js
+++ b/js/ui/windowManager.js
@@ -117,12 +117,13 @@ class DisplayChangeDialog extends ModalDialog.ModalDialog {
 
 var WindowDimmer = class {
     constructor(actor) {
-        this._brightnessEffect = new Clutter.BrightnessContrastEffect();
+        this._brightnessEffect = new Clutter.BrightnessContrastEffect({
+            enabled: false
+        });
         actor.add_effect(this._brightnessEffect);
         this.actor = actor;
         this._enabled = true;
         this._dimFactor = 0.0;
-        this._syncEnabled();
     }
 
     _syncEnabled() {