[DevTools] Merge Worker domain to Target, migrate clients.

third_party/WebKit/Source/devtools/front_end/timeline/TimelineController.js

 // Copyright 2016 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
  * @param {!WebInspector.Target} target
  * @param {!WebInspector.TimelineLifecycleDelegate} delegate
  * @param {!WebInspector.TracingModel} tracingModel
  * @implements {WebInspector.TargetManager.Observer}
@@ skipping 249 matching lines @@
         if (!mainMetaEvent)
             return;
 
         var pid = mainMetaEvent.thread.process().id();
         var mainCpuProfile = this._cpuProfiles.get(this._target.id());
         this._injectCpuProfileEvent(pid, mainMetaEvent.thread.id(), mainCpuProfile);
 
         var workerMetaEvents = metadataEvents.filter(event => event.name === metadataEventTypes.TracingSessionIdForWorker);
         for (var metaEvent of workerMetaEvents) {
             var workerId = metaEvent.args["data"]["workerId"];
-            var workerTarget = this._target.workerManager ? this._target.workerManager.targetByWorkerId(workerId) : null;
+            var workerTarget = this._target.subTargetsManager ? this._target.subTargetsManager.targetForId(workerId) : null;
             if (!workerTarget)
                 continue;
             var cpuProfile = this._cpuProfiles.get(workerTarget.id());
             this._injectCpuProfileEvent(pid, metaEvent.args["data"]["workerThreadId"], cpuProfile);
         }
         this._cpuProfiles = null;
     },
 
     /**
      * @param {number} usage
      * @override
      */
     tracingBufferUsage: function(usage)
     {
         this._delegate.recordingProgress(usage);
     },
 
     /**
      * @param {number} progress
      * @override
      */
     eventsRetrievalProgress: function(progress)
     {
         this._delegate.loadingProgress(progress);
     }
 };