Browser side of new ServiceWorker 'sync' event.

content/browser/service_worker/service_worker_version.cc

Index: content/browser/service_worker/service_worker_version.cc
diff --git a/content/browser/service_worker/service_worker_version.cc b/content/browser/service_worker/service_worker_version.cc
index fade655ca6c776b425fb9cfb1a995e62a7a17a2b..42f97cd6d11602aaba220d6df497bff7dfb5060f 100644
--- a/content/browser/service_worker/service_worker_version.cc
+++ b/content/browser/service_worker/service_worker_version.cc
@@ -279,6 +279,18 @@ void ServiceWorkerVersion::DispatchFetchEvent(
       base::Bind(&HandleFetchResponse, callback));
 }
 
+void ServiceWorkerVersion::DispatchSyncEvent(const StatusCallback& callback) {
+  DCHECK_EQ(ACTIVE, status()) << status();
+  SendMessageAndRegisterCallback(
+      ServiceWorkerMsg_SyncEvent(-1),
+      base::Bind(&HandleEventFinished,
+                 weak_factory_.GetWeakPtr(),
+                 ServiceWorkerHostMsg_SyncEventFinished::ID,
+                 callback,
+                 ACTIVE,
+                 ACTIVE));
+}
+
 void ServiceWorkerVersion::AddProcessToWorker(int process_id) {
   DCHECK(!is_shutdown_);
   embedded_worker_->AddProcessReference(process_id);