Implement the ServiceWorker "activate" event during activation

content/browser/service_worker/embedded_worker_test_helper.cc

Index: content/browser/service_worker/embedded_worker_test_helper.cc
diff --git a/content/browser/service_worker/embedded_worker_test_helper.cc b/content/browser/service_worker/embedded_worker_test_helper.cc
index 6617eea4f0bcc344cb56cda6d40d8f74a417d214..96bcfdaedfc15f93ab308cae51cec5d0cf859edd 100644
--- a/content/browser/service_worker/embedded_worker_test_helper.cc
+++ b/content/browser/service_worker/embedded_worker_test_helper.cc
@@ -78,6 +78,7 @@ bool EmbeddedWorkerTestHelper::OnSendMessageToWorker(
     const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(EmbeddedWorkerTestHelper, message)
+    IPC_MESSAGE_HANDLER(ServiceWorkerMsg_ActivateEvent, OnActivateEventStub)
     IPC_MESSAGE_HANDLER(ServiceWorkerMsg_InstallEvent, OnInstallEventStub)
     IPC_MESSAGE_HANDLER(ServiceWorkerMsg_FetchEvent, OnFetchEventStub)
     IPC_MESSAGE_UNHANDLED(handled = false)
@@ -87,6 +88,15 @@ bool EmbeddedWorkerTestHelper::OnSendMessageToWorker(
   return handled;
 }
 
+void EmbeddedWorkerTestHelper::OnActivateEvent(int embedded_worker_id,
+                                               int request_id) {
+  SimulateSendMessageToBrowser(
+      embedded_worker_id,
+      request_id,
+      ServiceWorkerHostMsg_ActivateEventFinished(
+          blink::WebServiceWorkerEventResultCompleted));
+}
+
 void EmbeddedWorkerTestHelper::OnInstallEvent(int embedded_worker_id,
                                               int request_id,
                                               int active_version_id) {
@@ -179,6 +189,15 @@ void EmbeddedWorkerTestHelper::OnSendMessageToWorkerStub(
           message));
 }
 
+void EmbeddedWorkerTestHelper::OnActivateEventStub() {
+  base::MessageLoopProxy::current()->PostTask(
+      FROM_HERE,
+      base::Bind(&EmbeddedWorkerTestHelper::OnActivateEvent,
+                 weak_factory_.GetWeakPtr(),
+                 current_embedded_worker_id_,
+                 current_request_id_));
+}
+
 void EmbeddedWorkerTestHelper::OnInstallEventStub(int active_version_id) {
   base::MessageLoopProxy::current()->PostTask(
       FROM_HERE,