Add callbacks on Dom and Data

src/data/DataManager.js

@@ -6,6 +6,15 @@
 
 var Class = require('../utils/Class');
 
+/**
+ * @callback DataEachCallback
+ *
+ * @param {any} parent - [description]
+ * @param {string} key - [description]
+ * @param {any} value - [description]
+ * @param {...*} [arguments] - Additional arguments that will be passed to the callback, after the game object, key, and data.
+ */
+
 /**
  * @classdesc
  * The Data Component features a means to store pieces of data specific to a Game Object, System or Plugin.
@@ -199,7 +208,7 @@ var DataManager = new Class({
      * @method Phaser.Data.DataManager#each
      * @since 3.0.0
      *
-     * @param {function} callback - The function to call.
+     * @param {DataEachCallback} callback - The function to call.
      * @param {object} [scope] - Value to use as `this` when executing callback.
      * @param {...*} [arguments] - Additional arguments that will be passed to the callback, after the game object, key, and data.
      *

src/dom/DOMContentLoaded.js

@@ -6,6 +6,10 @@
 
 var OS = require('../device/OS');
 
+/**
+ * @callback ContentLoadedCallback
+ */
+
 /**
  * Inspects the readyState of the document. If the document is already complete then it invokes the given callback.
  * If not complete it sets up several event listeners such as `deviceready`, and once those fire, it invokes the callback.
@@ -14,7 +18,7 @@ var OS = require('../device/OS');
  * @function Phaser.DOM.DOMContentLoaded
  * @since 3.0.0
  *
- * @param {function} callback - The callback to be invoked when the device is ready and the DOM content is loaded.
+ * @param {ContentLoadedCallback} callback - The callback to be invoked when the device is ready and the DOM content is loaded.
  */
 var DOMContentLoaded = function (callback)
 {

src/dom/RequestAnimationFrame.js

@@ -37,7 +37,7 @@ var RequestAnimationFrame = new Class({
          * The callback to be invoked each step.
          *
          * @name Phaser.DOM.RequestAnimationFrame#callback
-         * @type {function}
+         * @type {FrameRequestCallback}
          * @since 3.0.0
          */
         this.callback = NOOP;
@@ -89,7 +89,7 @@ var RequestAnimationFrame = new Class({
          * Updates the local tick value, invokes the callback and schedules another call to requestAnimationFrame.
          *
          * @name Phaser.DOM.RequestAnimationFrame#step
-         * @type {function}
+         * @type {FrameRequestCallback}
          * @since 3.0.0
          */
         this.step = function step (timestamp)
@@ -134,7 +134,7 @@ var RequestAnimationFrame = new Class({
      * @method Phaser.DOM.RequestAnimationFrame#start
      * @since 3.0.0
      *
-     * @param {function} callback - The callback to invoke each step.
+     * @param {FrameRequestCallback} callback - The callback to invoke each step.
      * @param {boolean} forceSetTimeOut - Should it use SetTimeout, even if RAF is available?
      */
     start: function (callback, forceSetTimeOut)