[Devtools] Template fromTarget() function calls to model

third_party/WebKit/Source/devtools/front_end/sdk/ServiceWorkerCacheModel.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.ServiceWorkerCacheModel = class extends SDK.SDKModel {
   /**
    * Invariant: This model can only be constructed on a ServiceWorker target.
    * @param {!SDK.Target} target
@@ skipping 13 matching lines @@
     this._enabled = false;
   }
 
   /**
    * @param {!SDK.Target} target
    * @return {?SDK.ServiceWorkerCacheModel}
    */
   static fromTarget(target) {
     if (!target.hasBrowserCapability())
       return null;
-    var instance =
-        /** @type {?SDK.ServiceWorkerCacheModel} */ (target.model(SDK.ServiceWorkerCacheModel));
+    var instance = target.model(SDK.ServiceWorkerCacheModel);
     if (!instance)
       instance = new SDK.ServiceWorkerCacheModel(target, SDK.SecurityOriginManager.fromTarget(target));
     return instance;
   }
 
   enable() {
     if (this._enabled)
       return;
 
     this._securityOriginManager.addEventListener(
@@ skipping 270 matching lines @@
   }
 
   /**
    * @override
    * @return {string}
    */
   toString() {
     return this.securityOrigin + this.cacheName;
   }
 };