definitions fixed

ui/core/control-state-change.d.ts

@@ -0,0 +1,14 @@
+declare module "ui/core/control-state-change" {
+    /**
+     * An utility class used for supporting styling infrastructure.
+     */
+    class ControlStateChangeListener {
+
+        /**
+         * Initializes an instance of ControlStateChangeListener class.
+         * @param control An instance of the UIControl which state will be watched.
+         * @param callback A callback called when a visual state of the UIControl is changed.
+         */
+        constructor(control: UIControl, callback: (state: string) => void);
+    }
+}