Restart running apps when chrome restarts.

chrome/common/extensions/api/app_runtime.idl

Index: chrome/common/extensions/api/app_runtime.idl
diff --git a/chrome/common/extensions/api/app_runtime.idl b/chrome/common/extensions/api/app_runtime.idl
index c2d54c4353ba52f0151b4440f62bf7ab69dd19ff..6e2c71ac4b09083d7b2a59572ad46054ff4459c5 100644
--- a/chrome/common/extensions/api/app_runtime.idl
+++ b/chrome/common/extensions/api/app_runtime.idl
@@ -30,7 +30,13 @@ namespace app.runtime {
   };
 
   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 {