Implement the ServiceWorker "activate" event during activation

content/renderer/service_worker/embedded_worker_context_client.cc

Index: content/renderer/service_worker/embedded_worker_context_client.cc
diff --git a/content/renderer/service_worker/embedded_worker_context_client.cc b/content/renderer/service_worker/embedded_worker_context_client.cc
index 56fa30cfac6c4ac4e9df21c2faa119bb4c5b5bf6..2feb96f88c80b86fa4b02c1a79283185d1d2cfc0 100644
--- a/content/renderer/service_worker/embedded_worker_context_client.cc
+++ b/content/renderer/service_worker/embedded_worker_context_client.cc
@@ -120,6 +120,13 @@ void EmbeddedWorkerContextClient::workerContextDestroyed() {
                  embedded_worker_id_));
 }
 
+void EmbeddedWorkerContextClient::didHandleActivateEvent(
+    int request_id,
+    blink::WebServiceWorkerEventResult result) {
+  DCHECK(script_context_);
+  script_context_->DidHandleActivateEvent(request_id, result);
+}
+
 void EmbeddedWorkerContextClient::didHandleInstallEvent(
     int request_id,
     blink::WebServiceWorkerEventResult result) {