[Pages] Move page plugin into platform

Move Page plugin from prototype location into
platform, WTD-1145.

platform/features/pages/src/IFrameController.js

@@ -0,0 +1,19 @@
+/*global define*/
+
+define(
+    [],
+    function () {
+        "use strict";
+
+        function Controller($sce) {
+            return {
+                trust: function (url) {
+                    return $sce.trustAsResourceUrl(url);
+                }
+            };
+        }
+
+        return Controller;
+    }
+
+);