Adapt to removal of Mutter namespace

MutterWindow and MutterPlugin have been renamed to MetaWindowActor
and MetaPlugin, mutter_plugin_list_windows() to
meta_plugin_list_window_actors(). Adapt to those changes.

https://bugzilla.gnome.org/show_bug.cgi?id=632500

js/ui/chrome.js

@@ -233,7 +233,7 @@ Chrome.prototype = {
     },
 
     _windowsRestacked: function() {
-        let windows = global.get_windows();
+        let windows = global.get_window_actors();
         let primary = global.get_primary_monitor();
 
         // The chrome layer should be visible unless there is a window

js/ui/lookingGlass.js

@@ -220,7 +220,7 @@ WindowList.prototype = {
 
     _updateWindowList: function() {
         this.actor.get_children().forEach(function (actor) { actor.destroy(); });
-        let windows = global.get_windows();
+        let windows = global.get_window_actors();
         let tracker = Shell.WindowTracker.get_default();
         for (let i = 0; i < windows.length; i++) {
             let metaWindow = windows[i].metaWindow;

js/ui/main.js

@@ -253,11 +253,11 @@ function _relayout() {
 // metacity-clutter currently uses the same prefs as plain metacity,
 // which probably means we'll be starting out with multiple workspaces;
 // remove any unused ones. (We do this from an idle handler, because
-// global.get_windows() still returns NULL at the point when start()
+// global.get_window_actors() still returns NULL at the point when start()
 // is called.)
 function _removeUnusedWorkspaces() {
 
-    let windows = global.get_windows();
+    let windows = global.get_window_actors();
     let maxWorkspace = 0;
     for (let i = 0; i < windows.length; i++) {
         let win = windows[i];

js/ui/windowManager.js

@@ -415,7 +415,7 @@ WindowManager.prototype = {
             return;
         }
 
-        let windows = global.get_windows();
+        let windows = global.get_window_actors();
 
         /* @direction is the direction that the "camera" moves, so the
          * screen contents have to move one screen's worth in the

js/ui/workspace.js

@@ -602,7 +602,7 @@ Workspace.prototype = {
         this.actor.height = global.screen_height;
         this.scale = 1.0;
 
-        let windows = global.get_windows().filter(this._isMyWindow, this);
+        let windows = global.get_window_actors().filter(this._isMyWindow, this);
 
         // Find the desktop window
         for (let i = 0; i < windows.length; i++) {

js/ui/workspacesView.js

@@ -190,7 +190,7 @@ GenericWorkspacesView.prototype = {
     },
 
     _onRestacked: function() {
-        let stack = global.get_windows();
+        let stack = global.get_window_actors();
         let stackIndices = {};
 
         for (let i = 0; i < stack.length; i++) {