[DevTools] Make NetworkLog a singleton, and not an 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 226 matching lines @@
    * @param {string} name
    * @param {number} capabilitiesMask
    * @param {!Protocol.InspectorBackend.Connection.Factory} connectionFactory
    * @param {?SDK.Target} parentTarget
    * @return {!SDK.Target}
    */
   createTarget(id, name, capabilitiesMask, connectionFactory, parentTarget) {
     var target = new SDK.Target(this, id, name, capabilitiesMask, connectionFactory, parentTarget);
     this._pendingTargets.add(target);
 
-    var networkManager = target.model(SDK.NetworkManager);
+    target.model(SDK.NetworkManager);
     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.LogModel);
     target.model(SDK.DOMModel);
     target.model(SDK.CSSModel);
     target.model(SDK.CPUProfilerModel);
     target.model(SDK.ServiceWorkerManager);
 
     if (target.hasTargetCapability())
@@ skipping 424 matching lines @@
   /**
    * @param {!T} model
    */
   modelRemoved(model) {},
 };
 
 /**
  * @type {!SDK.TargetManager}
  */
 SDK.targetManager = new SDK.TargetManager();