[DevTools] Replace the target type with capabilities

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.
 
 /**
  * @constructor
  * @extends {WebInspector.VBox}
  * @implements {WebInspector.TargetManager.Observer}
  */
 WebInspector.AppManifestView = function()
@@ skipping 114 matching lines @@
             var value = parsedManifest[name];
             if (typeof value !== "string")
                 return "";
             return value;
         }
     },
 
     _addToHomescreen: function()
     {
         var target = WebInspector.targetManager.mainTarget();
-        if (target && target.isPage()) {
+        if (target && target.hasBrowserCapability()) {
             target.pageAgent().requestAppBanner();
             WebInspector.console.show();
         }
     },
 
     __proto__: WebInspector.VBox.prototype
 }