[DevTools] Remove SDKModels' fromTarget methods

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

 // Copyright (c) 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}
+ * @implements {SDK.SDKModelObserver<!SDK.ResourceTreeModel>}
  * @unrestricted
  */
 Resources.AppManifestView = class extends UI.VBox {
   constructor() {
     super(true);
     this.registerRequiredCSS('resources/appManifestView.css');
 
     this._emptyView = new UI.EmptyWidget(Common.UIString('No manifest detected'));
     var p = this._emptyView.appendParagraph();
     var linkElement = UI.createExternalLink('https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/?utm_source=devtools',
@@ skipping 28 matching lines @@
     this._themeColorSwatch = InlineEditor.ColorSwatch.create();
     themeColorField.appendChild(this._themeColorSwatch);
 
     var backgroundColorField = this._presentationSection.appendField(Common.UIString('Background color'));
     this._backgroundColorSwatch = InlineEditor.ColorSwatch.create();
     backgroundColorField.appendChild(this._backgroundColorSwatch);
 
     this._orientationField = this._presentationSection.appendField(Common.UIString('Orientation'));
     this._displayField = this._presentationSection.appendField(Common.UIString('Display'));
 
-    SDK.targetManager.observeTargets(this, SDK.Target.Capability.DOM);
+    SDK.targetManager.observeModels(SDK.ResourceTreeModel, this);
   }
 
   /**
    * @override
-   * @param {!SDK.Target} target
+   * @param {!SDK.ResourceTreeModel} resourceTreeModel
    */
-  targetAdded(target) {
+  modelAdded(resourceTreeModel) {
     if (this._resourceTreeModel)
       return;
-    var resourceTreeModel = SDK.ResourceTreeModel.fromTarget(target);
-    if (!resourceTreeModel)
-      return;
     this._resourceTreeModel = resourceTreeModel;
     this._updateManifest();
     resourceTreeModel.addEventListener(SDK.ResourceTreeModel.Events.MainFrameNavigated, this._updateManifest, this);
   }
 
   /**
    * @override
-   * @param {!SDK.Target} target
+   * @param {!SDK.ResourceTreeModel} resourceTreeModel
    */
-  targetRemoved(target) {
-    var resourceTreeModel = SDK.ResourceTreeModel.fromTarget(target);
+  modelRemoved(resourceTreeModel) {
     if (!this._resourceTreeModel || this._resourceTreeModel !== resourceTreeModel)
       return;
     resourceTreeModel.removeEventListener(SDK.ResourceTreeModel.Events.MainFrameNavigated, this._updateManifest, this);
     delete this._resourceTreeModel;
   }
 
   _updateManifest() {
     this._resourceTreeModel.fetchAppManifest(this._renderManifest.bind(this));
   }
 
@@ skipping 70 matching lines @@
    * @param {!Common.Event} event
    */
   _addToHomescreen(event) {
     var target = SDK.targetManager.mainTarget();
     if (target && target.hasBrowserCapability()) {
       target.pageAgent().requestAppBanner();
       Common.console.show();
     }
   }
 };