[DevTools] Turn TracingManager into SDKModel.

third_party/WebKit/Source/devtools/front_end/sdk/TargetManager.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.
  */
 
 SDK.TargetManager = class extends Common.Object {
   constructor() {
     super();
     /** @type {!Array.<!SDK.Target>} */
@@ skipping 240 matching lines @@
     var resourceTreeModel = target.model(SDK.ResourceTreeModel);
     if (networkManager && resourceTreeModel)
       new SDK.NetworkLog(target, resourceTreeModel, networkManager);
 
     /** @type {!SDK.RuntimeModel} */
     target.runtimeModel = /** @type {!SDK.RuntimeModel} */ (target.model(SDK.RuntimeModel));
     target.model(SDK.DebuggerModel);
     target.model(SDK.DOMModel);
     target.model(SDK.CSSModel);
     target.model(SDK.CPUProfilerModel);
-
-    target.tracingManager = new SDK.TracingManager(target);
-
     target.model(SDK.ServiceWorkerManager);
 
     if (target.hasTargetCapability())
       this._childTargetManagers.set(target, new SDK.ChildTargetManager(this, target, resourceTreeModel));
 
     // Force creation of models which have observers.
     for (var modelClass of this._modelObservers.keys())
       target.model(modelClass);
     this._pendingTargets.delete(target);
 
@@ skipping 125 matching lines @@
           this, 'main', Common.UIString('Node'), SDK.Target.Capability.Target, this._createMainConnection.bind(this),
           null);
       target.setInspectedURL('Node');
       this._childTargetManagers.set(target, new SDK.ChildTargetManager(this, target, null));
       Host.userMetrics.actionTaken(Host.UserMetrics.Action.ConnectToNodeJSFromFrontend);
       return;
     }
 
     var capabilities = SDK.Target.Capability.Browser | SDK.Target.Capability.DOM | SDK.Target.Capability.JS |
         SDK.Target.Capability.Log | SDK.Target.Capability.Network | SDK.Target.Capability.Target |
-        SDK.Target.Capability.ScreenCapture;
+        SDK.Target.Capability.ScreenCapture | SDK.Target.Capability.Tracing;
     if (Runtime.queryParam('isSharedWorker')) {
       capabilities = SDK.Target.Capability.Browser | SDK.Target.Capability.Log | SDK.Target.Capability.Network |
           SDK.Target.Capability.Target;
     } else if (Runtime.queryParam('v8only')) {
       capabilities = SDK.Target.Capability.JS;
       Host.userMetrics.actionTaken(Host.UserMetrics.Action.ConnectToNodeJSDirectly);
     }
 
     var target =
         this.createTarget('main', Common.UIString('Main'), capabilities, this._createMainConnection.bind(this), null);
@@ skipping 93 matching lines @@
    * @param {string} type
    * @return {number}
    */
   _capabilitiesForType(type) {
     if (type === 'worker')
       return SDK.Target.Capability.JS | SDK.Target.Capability.Log;
     if (type === 'service_worker')
       return SDK.Target.Capability.Log | SDK.Target.Capability.Network | SDK.Target.Capability.Target;
     if (type === 'iframe') {
       return SDK.Target.Capability.Browser | SDK.Target.Capability.DOM | SDK.Target.Capability.JS |
-          SDK.Target.Capability.Log | SDK.Target.Capability.Network | SDK.Target.Capability.Target;
+          SDK.Target.Capability.Log | SDK.Target.Capability.Network | SDK.Target.Capability.Target |
+          SDK.Target.Capability.Tracing;
     }
     if (type === 'node')
       return SDK.Target.Capability.JS;
     return 0;
   }
 
   _detachWorkersOnMainFrameNavigated() {
     // TODO(dgozman): send these from backend.
     var idsToDetach = [];
     for (var target of this._targetManager._targets) {
@@ skipping 168 matching lines @@
   /**
    * @param {!T} model
    */
   modelRemoved(model) {},
 };
 
 /**
  * @type {!SDK.TargetManager}
  */
 SDK.targetManager = new SDK.TargetManager();