[DevTools] Do not expose agents on Target

third_party/WebKit/Source/devtools/front_end/sdk/EmulationModel.js

 // Copyright 2017 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.EmulationModel = class extends SDK.SDKModel {
   /**
    * @param {!SDK.Target} target
+   * @param {!Protocol.Dispatcher} dispatcher
    */
-  constructor(target) {
-    super(target);
-    this._emulationAgent = target.emulationAgent();
-    this._pageAgent = target.pageAgent();
-    this._deviceOrientationAgent = target.deviceOrientationAgent();
+  constructor(target, dispatcher) {
+    super(target, dispatcher);
+    this._emulationAgent = dispatcher.emulationAgent();
+    this._pageAgent = dispatcher.pageAgent();
+    this._deviceOrientationAgent = dispatcher.deviceOrientationAgent();
     this._cssModel = target.model(SDK.CSSModel);
     this._overlayModel = target.model(SDK.OverlayModel);
     if (this._overlayModel)
       this._overlayModel.addEventListener(SDK.OverlayModel.Events.InspectModeWillBeToggled, this._updateTouch, this);
 
     var disableJavascriptSetting = Common.settings.moduleSetting('javaScriptDisabled');
     disableJavascriptSetting.addChangeListener(
         () => this._emulationAgent.setScriptExecutionDisabled(disableJavascriptSetting.get()));
     if (disableJavascriptSetting.get())
       this._emulationAgent.setScriptExecutionDisabled(true);
@@ skipping 300 matching lines @@
     return /^([+-]?[\d]+(\.\d+)?|[+-]?\.\d+)$/.test(value);
   }
 
   /**
    * @return {string}
    */
   toSetting() {
     return JSON.stringify(this);
   }
 };