DevTools: WI.Throttler goes promisified.

Source/devtools/front_end/platform/utilities.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 1404 matching lines @@
      */
     callWhenDone: function(callback)
     {
         console.assert(!this._outgoingCallback, "CallbackBarrier.callWhenDone() is called multiple times");
         this._outgoingCallback = callback;
         if (!this._pendingIncomingCallbacksCount)
             this._outgoingCallback();
     },
 
     /**
+     * @return {!Promise.<undefined>}
+     */
+    donePromise: function()
+    {
+        return new Promise(promiseConstructor.bind(this));
+
+        /**
+         * @param {function()} success
+         * @this {CallbackBarrier}
+         */
+        function promiseConstructor(success)
+        {
+            this.callWhenDone(success);
+        }
+    },
+
+    /**
      * @param {function(...)=} userCallback
      */
     _incomingCallback: function(userCallback)
     {
         console.assert(this._pendingIncomingCallbacksCount > 0);
         if (userCallback) {
             var args = Array.prototype.slice.call(arguments, 1);
             userCallback.apply(null, args);
         }
         if (!--this._pendingIncomingCallbacksCount && this._outgoingCallback)
@@ skipping 37 matching lines @@
  * @param {T} defaultValue
  * @return {!Promise.<T>}
  * @template T
  */
 Promise.prototype.catchException = function(defaultValue) {
     return this.catch(function (error) {
         console.error(error);
         return defaultValue;
     });
 }