Timeline: produce session cookie when timeline is started

Source/devtools/front_end/TimelineManager.js

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 20 matching lines @@
 /**
  * @constructor
  * @extends {WebInspector.TargetAwareObject}
  * @param {!WebInspector.Target} target
  */
 WebInspector.TimelineManager = function(target)
 {
     WebInspector.TargetAwareObject.call(this, target);
     this._dispatcher = new WebInspector.TimelineDispatcher(this);
     this._enablementCount = 0;
+    this._sessionId = "";
     TimelineAgent.enable(WebInspector.experimentsSettings.timelineTracingMode.isEnabled() ? WebInspector.TimelineManager.defaultTracingCategories : "");
 }
 
 WebInspector.TimelineManager.EventTypes = {
     TimelineStarted: "TimelineStarted",
     TimelineStopped: "TimelineStopped",
     TimelineEventRecorded: "TimelineEventRecorded",
     TimelineProgress: "TimelineProgress"
 }
 
@@ skipping 69 matching lines @@
             masterProfile = profile;
         }
 
         function allDoneCallback()
         {
             callback(masterError, masterProfile);
         }
     },
 
     /**
+     * @return {string}
+     */
+    sessionId: function()
+    {
+        return this._sessionId;
+    },
+
+    /**
      * @param {function(?Protocol.Error)|undefined} callback
      * @param {?Protocol.Error} error
      * @param {!Array.<!TimelineAgent.TimelineEvent>=} events
      */
     _processBufferedEvents: function(callback, error, events)
     {
         if (events) {
             for (var i = 0; i < events.length; ++i)
                 this._dispatcher.eventRecorded(events[i]);
         }
@@ skipping 36 matching lines @@
 
     /**
      * @return {boolean}
      */
     isStarted: function()
     {
         return !!this._started;
     },
 
     /**
+     * @param {string} sessionId
      * @param {boolean=} consoleTimeline
      */
-    started: function(consoleTimeline)
+    started: function(sessionId, consoleTimeline)
     {
         if (consoleTimeline) {
             // Wake up timeline panel module.
             WebInspector.moduleManager.loadModule("timeline");
         }
         this._started = true;
+        this._manager._sessionId = sessionId;
         this._manager.dispatchEventToListeners(WebInspector.TimelineManager.EventTypes.TimelineStarted, consoleTimeline);
     },
 
     /**
      * @param {boolean=} consoleTimeline
      */
     stopped: function(consoleTimeline)
     {
         this._started = false;
         this._manager.dispatchEventToListeners(WebInspector.TimelineManager.EventTypes.TimelineStopped, consoleTimeline);
     },
 
     /**
      * @param {number} count
      */
     progress: function(count)
     {
         this._manager.dispatchEventToListeners(WebInspector.TimelineManager.EventTypes.TimelineProgress, count);
     }
 }
 
 /**
  * @type {!WebInspector.TimelineManager}
  */
 WebInspector.timelineManager;