The blink half of the new ServiceWorker 'sync' event.

Source/web/ServiceWorkerGlobalScopeProxy.cpp

Index: Source/web/ServiceWorkerGlobalScopeProxy.cpp
diff --git a/Source/web/ServiceWorkerGlobalScopeProxy.cpp b/Source/web/ServiceWorkerGlobalScopeProxy.cpp
index eb231226b910c66c5deae8a65f71784494e1ffff..eac77767eb485f805953b45b3fa64067ea1af3bb 100644
--- a/Source/web/ServiceWorkerGlobalScopeProxy.cpp
+++ b/Source/web/ServiceWorkerGlobalScopeProxy.cpp
@@ -85,6 +85,13 @@ void ServiceWorkerGlobalScopeProxy::dispatchMessageEvent(const WebString& messag
     m_workerGlobalScope->dispatchEvent(MessageEvent::create(ports.release(), value));
 }
 
+void ServiceWorkerGlobalScopeProxy::dispatchSyncEvent(int eventID)
+{
+    ASSERT(m_workerGlobalScope);
+    m_workerGlobalScope->dispatchEvent(Event::create(EventTypeNames::sync));
+    ServiceWorkerGlobalScopeClient::from(m_workerGlobalScope)->didHandleSyncEvent(eventID);
+}
+
 void ServiceWorkerGlobalScopeProxy::reportException(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL)
 {
     m_client.reportException(errorMessage, lineNumber, columnNumber, sourceURL);