[DevTools] Remove dependency from TargetManager to ResourceTreeModel

third_party/WebKit/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.
  */
 
 /**
  * @unrestricted
  */
 SDK.Target = class extends Protocol.TargetBase {
@@ skipping 125 matching lines @@
 
   /**
    * @param {function(new:T, !SDK.Target)} modelClass
    * @return {?T}
    * @template T
    */
   model(modelClass) {
     if (!this._modelByConstructor.get(modelClass)) {
       var capabilities = SDK.SDKModel._capabilitiesByModelClass.get(modelClass);
       if (capabilities === undefined)
-        throw 'Model class is not registered';
+        throw 'Model class is not registered @' + new Error().stack;
       if ((this._capabilitiesMask & capabilities) === capabilities) {
         var model = new modelClass(this);
         this._modelByConstructor.set(modelClass, model);
         this._targetManager.modelAdded(this, modelClass, model);
       }
     }
     return this._modelByConstructor.get(modelClass) || null;
   }
 
   /**
@@ skipping 99 matching lines @@
  * @param {number} capabilities
  */
 SDK.SDKModel.register = function(modelClass, capabilities) {
   if (!SDK.SDKModel._capabilitiesByModelClass)
     SDK.SDKModel._capabilitiesByModelClass = new Map();
   SDK.SDKModel._capabilitiesByModelClass.set(modelClass, capabilities);
 };
 
 /** @type {!Map<function(new:SDK.SDKModel, !SDK.Target), number>} */
 SDK.SDKModel._capabilitiesByModelClass;