DevTools: remove old Timeline front-end implementation

Source/devtools/front_end/sdk/Target.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
  * @extends {Protocol.Agents}
  * @param {string} name
@@ skipping 11 matching lines @@
     /** @type {!Map.<!Function, !WebInspector.SDKModel>} */
     this._modelByConstructor = new Map();
 
     /** @type {!Object.<string, boolean>} */
     this._capabilities = {};
     this.pageAgent().canScreencast(this._initializeCapability.bind(this, WebInspector.Target.Capabilities.CanScreencast, null));
     this.pageAgent().canEmulate(this._initializeCapability.bind(this, WebInspector.Target.Capabilities.CanEmulate, null));
     if (Runtime.experiments.isEnabled("timelinePowerProfiler"))
         this.powerAgent().canProfilePower(this._initializeCapability.bind(this, WebInspector.Target.Capabilities.CanProfilePower, null));
     this.workerAgent().canInspectWorkers(this._initializeCapability.bind(this, WebInspector.Target.Capabilities.CanInspectWorkers, this._loadedWithCapabilities.bind(this, callback)));
-    if (Runtime.experiments.isEnabled("timelineOnTraceEvents"))
-        this.consoleAgent().setTracingBasedTimeline(true);
+    this.consoleAgent().setTracingBasedTimeline(true);
 }
 
 /**
  * @enum {string}
  */
 WebInspector.Target.Capabilities = {
     CanScreencast: "CanScreencast",
     HasTouchInputs: "HasTouchInputs",
     CanProfilePower: "CanProfilePower",
     CanInspectWorkers: "CanInspectWorkers",
@@ skipping 109 matching lines @@
             WebInspector.cssModel = this.cssModel;
 
         /** @type {!WebInspector.WorkerManager} */
         this.workerManager = new WebInspector.WorkerManager(this, this.hasCapability(WebInspector.Target.Capabilities.CanInspectWorkers));
         if (!WebInspector.workerManager)
             WebInspector.workerManager = this.workerManager;
 
         if (this.hasCapability(WebInspector.Target.Capabilities.CanProfilePower))
             WebInspector.powerProfiler = new WebInspector.PowerProfiler(this);
 
-        /** @type {!WebInspector.TimelineManager} */
-        this.timelineManager = new WebInspector.TimelineManager(this);
-
         /** @type {!WebInspector.DatabaseModel} */
         this.databaseModel = new WebInspector.DatabaseModel(this);
         if (!WebInspector.databaseModel)
             WebInspector.databaseModel = this.databaseModel;
 
         /** @type {!WebInspector.DOMStorageModel} */
         this.domStorageModel = new WebInspector.DOMStorageModel(this);
         if (!WebInspector.domStorageModel)
             WebInspector.domStorageModel = this.domStorageModel;
 
@@ skipping 380 matching lines @@
     /**
      * @param {!WebInspector.Target} target
      */
     targetRemoved: function(target) { },
 }
 
 /**
  * @type {!WebInspector.TargetManager}
  */
 WebInspector.targetManager = new WebInspector.TargetManager();