[DevTools] Consolidate overlay-related functionality in Overlay domain

third_party/WebKit/Source/devtools/front_end/emulation/TouchModel.js

 // Copyright 2016 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.
 /**
  * @implements {SDK.TargetManager.Observer}
  * @unrestricted
  */
 Emulation.MultitargetTouchModel = class {
   constructor() {
     this._touchEnabled = false;
@@ skipping 36 matching lines @@
   }
 
   /**
    * @param {!SDK.Target} target
    */
   _applyToTarget(target) {
     var current = {enabled: this._touchEnabled, configuration: this._touchMobile ? 'mobile' : 'desktop'};
     if (this._customTouchEnabled)
       current = {enabled: true, configuration: 'mobile'};
 
-    var domModel = target.model(SDK.DOMModel);
-    var inspectModeEnabled = domModel ? domModel.inspectModeEnabled() : false;
+    var overlayModel = target.model(SDK.OverlayModel);
+    var inspectModeEnabled = overlayModel ? overlayModel.inspectModeEnabled() : false;
     if (inspectModeEnabled)
       current = {enabled: false, configuration: 'mobile'};
 
     /**
      * @suppressGlobalPropertiesCheck
      */
     const injectedFunction = function() {
       const touchEvents = ['ontouchstart', 'ontouchend', 'ontouchmove', 'ontouchcancel'];
       var recepients = [window.__proto__, document.__proto__];
       for (var i = 0; i < touchEvents.length; ++i) {
@@ skipping 31 matching lines @@
       (target[symbol] || {}).scriptId = error ? '' : scriptId;
     }
 
     target.emulationAgent().setTouchEmulationEnabled(current.enabled, current.configuration);
   }
 
   /**
    * @param {!Common.Event} event
    */
   _inspectModeToggled(event) {
-    var domModel = /** @type {!SDK.DOMModel} */ (event.data);
-    this._applyToTarget(domModel.target());
+    var overlayModel = /** @type {!SDK.OverlayModel} */ (event.data);
+    this._applyToTarget(overlayModel.target());
   }
 
   /**
    * @override
    * @param {!SDK.Target} target
    */
   targetAdded(target) {
-    var domModel = target.model(SDK.DOMModel);
-    if (domModel)
-      domModel.addEventListener(SDK.DOMModel.Events.InspectModeWillBeToggled, this._inspectModeToggled, this);
+    var overlayModel = target.model(SDK.OverlayModel);
+    if (overlayModel)
+      overlayModel.addEventListener(SDK.OverlayModel.Events.InspectModeWillBeToggled, this._inspectModeToggled, this);
     this._applyToTarget(target);
   }
 
   /**
    * @override
    * @param {!SDK.Target} target
    */
   targetRemoved(target) {
-    var domModel = target.model(SDK.DOMModel);
-    if (domModel)
-      domModel.removeEventListener(SDK.DOMModel.Events.InspectModeWillBeToggled, this._inspectModeToggled, this);
+    var overlayModel = target.model(SDK.OverlayModel);
+    if (overlayModel) {
+      overlayModel.removeEventListener(
+          SDK.OverlayModel.Events.InspectModeWillBeToggled, this._inspectModeToggled, this);
+    }
   }
 };
 
 Emulation.MultitargetTouchModel._symbol = Symbol('MultitargetTouchModel.symbol');
 
 /** @type {?Emulation.MultitargetTouchModel} */
 Emulation.MultitargetTouchModel._instance = null;