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

Source/web/ServiceWorkerGlobalScopeClientImpl.cpp

Index: Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
diff --git a/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp b/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
index 10b5cff59cf7575a133eb5fb2d86729c59e4e250..e5e43aed26d97c63662a4896a094c96a04e56bf0 100644
--- a/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
+++ b/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
@@ -50,14 +50,11 @@ ServiceWorkerGlobalScopeClientImpl::~ServiceWorkerGlobalScopeClientImpl()
 
 void ServiceWorkerGlobalScopeClientImpl::didHandleInstallEvent(int installEventID)
 {
-    if (m_client)
-        m_client->didHandleInstallEvent(installEventID);
+    m_client->didHandleInstallEvent(installEventID);
 }
 
 void ServiceWorkerGlobalScopeClientImpl::didHandleFetchEvent(int fetchEventID, PassRefPtr<WebCore::Response> response)
 {
-    if (!m_client)
-        return;
     if (!response) {
         m_client->didHandleFetchEvent(fetchEventID);
         return;
@@ -68,6 +65,11 @@ void ServiceWorkerGlobalScopeClientImpl::didHandleFetchEvent(int fetchEventID, P
     m_client->didHandleFetchEvent(fetchEventID, webResponse);
 }
 
+void ServiceWorkerGlobalScopeClientImpl::didHandleSyncEvent(int syncEventID)
+{
+    m_client->didHandleSyncEvent(syncEventID);
+}
+
 ServiceWorkerGlobalScopeClientImpl::ServiceWorkerGlobalScopeClientImpl(PassOwnPtr<WebServiceWorkerContextClient> client)
     : m_client(client)
 {