Implement the ServiceWorker "activate" event during activation

content/browser/service_worker/service_worker_version.cc

 // Copyright 2013 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 "content/browser/service_worker/service_worker_version.h"
 
 #include "base/stl_util.h"
 #include "content/browser/service_worker/embedded_worker_instance.h"
 #include "content/browser/service_worker/embedded_worker_registry.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
@@ skipping 288 matching lines @@
       SERVICE_WORKER_ERROR_INSTALL_WORKER_FAILED);
   SendMessageAndRegisterCallback(
       ServiceWorkerMsg_InstallEvent(active_version_id),
       base::Bind(&HandleInstallPhaseEventFinished, params));
 }
 
 void ServiceWorkerVersion::DispatchActivateEvent(
     const StatusCallback& callback) {
   DCHECK_EQ(INSTALLED, status()) << status();
   SetStatus(ACTIVATING);
-  // TODO(kinuko): Implement.
-  NOTIMPLEMENTED();
+  // TODO(dominicc): Also dispatch activate callbacks to the document,
+  // and activate end callbacks to the service worker and the document.
   HandleInstallPhaseEventFinishedParameters params(
       weak_factory_.GetWeakPtr(),
-      -1 /* dummy message_id */,
-      InstallPhaseEventFinishedMessageReader(),
+      ServiceWorkerHostMsg_ActivateEventFinished::ID,
+      base::Bind(&ServiceWorkerHostMsg_ActivateEventFinished::Read),
       callback,
       ACTIVE,
       INSTALLED,
       SERVICE_WORKER_ERROR_ACTIVATE_WORKER_FAILED);
-  RunSoon(base::Bind(&HandleInstallPhaseEventFinished,
-                     params,
-                     SERVICE_WORKER_OK,
-                     IPC::Message(-1, -1, IPC::Message::PRIORITY_NORMAL)));
+  SendMessageAndRegisterCallback(
+      ServiceWorkerMsg_ActivateEvent(),
+      base::Bind(&HandleInstallPhaseEventFinished, params));
 }
 
 void ServiceWorkerVersion::DispatchFetchEvent(
     const ServiceWorkerFetchRequest& request,
     const FetchCallback& callback) {
   DCHECK_EQ(ACTIVE, status()) << status();
   SendMessageAndRegisterCallback(
       ServiceWorkerMsg_FetchEvent(request),
       base::Bind(&HandleFetchResponse, callback));
 }
@@ skipping 40 matching lines @@
   if (callback) {
     callback->Run(SERVICE_WORKER_OK, message);
     message_callbacks_.Remove(request_id);
     return;
   }
   NOTREACHED() << "Got unexpected message: " << request_id
                << " " << message.type();
 }
 
 }  // namespace content