Switch platform apps from a declarative launch container to handling an onLaunched event.

chrome/browser/extensions/api/runtime/runtime_api.cc

 // 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.
 
 #include "chrome/browser/extensions/api/runtime/runtime_api.h"
 
 #include "chrome/common/extensions/extension.h"
 #include "chrome/browser/extensions/extension_event_router.h"
 #include "chrome/browser/profiles/profile.h"
 #include "googleurl/src/gurl.h"
 
 namespace {
 
 const char kOnInstalledEvent[] = "experimental.runtime.onInstalled";
+const char kOnLaunchedEvent[] = "experimental.runtime.onLaunched";
 
 }
 
 namespace extensions {
 
 // static
 void RuntimeEventRouter::DispatchOnInstalledEvent(
     Profile* profile, const Extension* extension) {
   // Special case: normally, extensions add their own lazy event listeners.
   // However, since the extension has just been installed, it hasn't had a
   // chance to register for events. So we register on its behalf. If the
   // extension does not actually have a listener, the event will just be
   // ignored.
   ExtensionEventRouter* router = profile->GetExtensionEventRouter();
   router->AddLazyEventListener(kOnInstalledEvent, extension->id());
   router->DispatchEventToExtension(
       extension->id(), kOnInstalledEvent, "[]", NULL, GURL());
 }
 
+void RuntimeEventRouter::DispatchOnLaunchedEvent(
+    Profile* profile, const Extension* extension) {
+  profile->GetExtensionEventRouter()->DispatchEventToExtension(
+      extension->id(), kOnLaunchedEvent, "[]", NULL, GURL());
+}
+
 }   // namespace extensions