Restart running apps when chrome restarts.

chrome/common/extensions/api/app_runtime.idl

 // Copyright (c) 2012 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.
 
 namespace app.runtime {
 
   callback NullCallback = void ();
 
   // A WebIntents intent object.
   [inline_doc] dictionary Intent {
@@ skipping 12 matching lines @@
     // Callback to be compatible with WebIntents.
     NullCallback postFailure;
   };
 
   // Optional data for the launch.
   [inline_doc] dictionary LaunchData {
     Intent intent;
   };
 
   interface Events {
+    // Fired when an app is launched from the launcher or in response to a web
+    // intent.
     static void onLaunched(optional LaunchData launchData);
+
+    // Fired at Chrome startup to apps that were running when Chrome last shut
+    // down.
+    static void onRestarted();
   };
 
   dictionary IntentResponse {
     // Identifies the intent.
     long intentId;
 
     // Was this intent successful? (i.e., postSuccess vs postFailure).
     boolean success;
 
     // Data associated with the intent response.
     any data;
   };
 
   interface Functions {
     // postIntentResponse is an internal method to responds to an intent
     // previously sent to a packaged app. This is identified by intentId, and
     // should only be invoked at most once per intentId.
     [nodoc] static void postIntentResponse(IntentResponse intentResponse);
   };
 };