Implement <appview>

extensions/common/api/app_runtime.idl

 // Copyright 2014 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.
 
 // Use the <code>chrome.app.runtime</code> API to manage the app lifecycle.
 // The app runtime manages app installation, controls the event page, and can
 // shut down the app at anytime.
 namespace app.runtime {
 
   [inline_doc] dictionary LaunchItem {
@@ skipping 24 matching lines @@
     // The referrer URL for the <code>onLaunched</code> event triggered by a
     // matching URL handler in the <code>url_handlers</code> manifest key.
     DOMString? referrerUrl;
 
     // Whether the app is being launched in a <a
     // href="https://support.google.com/chromebook/answer/3134673">Chrome OS
     // kiosk session</a>.
     boolean? isKioskSession;
   };
 
+  [inline_doc] dictionary AppEmbeddingRequest {
+    long? id;
+
+    DOMString embedderExtensionId;
+
+    [nocompile] static void allow(DOMString url, object api, DOMString schema);
+
+    [nocompile] static void deny();
+  };
+
   interface Events {
+    // Fired when an embedding app requests to embed this app.
+    static void onAppEmbeddingRequest(AppEmbeddingRequest request);
+
     // Fired when an app is launched from the launcher.
     static void onLaunched(optional LaunchData launchData);
 
     // Fired at Chrome startup to apps that were running when Chrome last shut
     // down.
     static void onRestarted();
   };
 };