[DevTools] Do not expose agents on Target

third_party/WebKit/Source/devtools/front_end/resources/DOMStorageModel.js

Index: third_party/WebKit/Source/devtools/front_end/resources/DOMStorageModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/resources/DOMStorageModel.js b/third_party/WebKit/Source/devtools/front_end/resources/DOMStorageModel.js
index 3b18865a4b0822343074bc7ee6d428d6771858df..f90397acc372a44d37841c3848f4ceec24f2a2b4 100644
--- a/third_party/WebKit/Source/devtools/front_end/resources/DOMStorageModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/resources/DOMStorageModel.js
@@ -109,21 +109,22 @@ Resources.DOMStorage.Events = {
 Resources.DOMStorageModel = class extends SDK.SDKModel {
   /**
    * @param {!SDK.Target} target
+   * @param {!Protocol.Dispatcher} dispatcher
    */
-  constructor(target) {
-    super(target);
+  constructor(target, dispatcher) {
+    super(target, dispatcher);
 
     this._securityOriginManager = target.model(SDK.SecurityOriginManager);
     /** @type {!Object.<string, !Resources.DOMStorage>} */
     this._storages = {};
-    this._agent = target.domstorageAgent();
+    this._agent = dispatcher.domstorageAgent();
+    dispatcher.registerDOMStorageDispatcher(new Resources.DOMStorageDispatcher(this));
   }
 
   enable() {
     if (this._enabled)
       return;
 
-    this.target().registerDOMStorageDispatcher(new Resources.DOMStorageDispatcher(this));
     this._securityOriginManager.addEventListener(
         SDK.SecurityOriginManager.Events.SecurityOriginAdded, this._securityOriginAdded, this);
     this._securityOriginManager.addEventListener(