DevTools: Support JS frames save/load for tracing timeline.

Source/devtools/front_end/timeline/TracingModel.js

 /*
  * Copyright 2014 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /**
  * @constructor
  */
 WebInspector.TracingModel = function()
@@ skipping 534 matching lines @@
 
 /**
  * @constructor
  * @extends {WebInspector.TracingModel.NamedObject}
  * @param {number} id
  */
 WebInspector.TracingModel.Process = function(id)
 {
     WebInspector.TracingModel.NamedObject.call(this);
     this._setName("Process " + id);
+    this._id = id;
     this._threads = {};
     this._objects = {};
     /** @type {!Array.<!WebInspector.TracingManager.EventPayload>} */
     this._asyncEvents = [];
     /** @type {!Object.<string, ?Array.<!WebInspector.TracingModel.Event>>} */
     this._openAsyncEvents = [];
 }
 
 WebInspector.TracingModel.Process.prototype = {
     /**
+     * @return {number}
+     */
+    id: function()
+    {
+        return this._id;
+    },
+
+    /**
      * @param {number} id
      * @return {!WebInspector.TracingModel.Thread}
      */
     threadById: function(id)
     {
         var thread = this._threads[id];
         if (!thread) {
             thread = new WebInspector.TracingModel.Thread(this, id);
             this._threads[id] = thread;
         }
@@ skipping 212 matching lines @@
     /**
      * @return {!Array.<!WebInspector.TracingModel.Event>}
      */
     asyncEvents: function()
     {
         return this._asyncEvents;
     },
 
     __proto__: WebInspector.TracingModel.NamedObject.prototype
 }