Port everything to class framework

The last patch in the sequence. Every place that was previously
setting prototype has been ported to Lang.Class, to make code more
concise and allow for better toString().

https://bugzilla.gnome.org/show_bug.cgi?id=664436

js/misc/docInfo.js

@@ -8,11 +8,9 @@ const Search = imports.ui.search;
 
 const THUMBNAIL_ICON_MARGIN = 2;
 
-function DocInfo(recentInfo) {
-    this._init(recentInfo);
-}
+const DocInfo = new Lang.Class({
+    Name: 'DocInfo',
 
-DocInfo.prototype = {
     _init : function(recentInfo) {
         this.recentInfo = recentInfo;
         // We actually used get_modified() instead of get_visited()
@@ -49,7 +47,7 @@ DocInfo.prototype = {
         }
         return mtype;
     }
-};
+});
 
 var docManagerInstance = null;
 
@@ -62,11 +60,9 @@ function getDocManager() {
 /**
  * DocManager wraps the DocSystem, primarily to expose DocInfo objects.
  */
-function DocManager() {
-    this._init();
-}
+const DocManager = new Lang.Class({
+    Name: 'DocManager',
 
-DocManager.prototype = {
     _init: function() {
         this._docSystem = Shell.DocSystem.get_default();
         this._infosByTimestamp = [];
@@ -135,6 +131,6 @@ DocManager.prototype = {
                 return this._infosByUri[url];
             })), terms);
     }
-};
+});
 
 Signals.addSignalMethods(DocManager.prototype);