Oilpan: fix WorkerThreadStartupData finalization handling.

Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp

Index: Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
diff --git a/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp b/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
index 5a2e75b00b6aff57b58b8db64f46ebb830c90cfa..3af04a81b7690dda7fef14a5c822c0d19d849f5c 100644
--- a/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
+++ b/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
@@ -77,8 +77,10 @@ private:
     RefPtrWillBePersistent<ScriptPromiseResolver> m_resolver;
 };
 
-PassRefPtrWillBeRawPtr<ServiceWorkerGlobalScope> ServiceWorkerGlobalScope::create(ServiceWorkerThread* thread, PassOwnPtrWillBeRawPtr<WorkerThreadStartupData> startupData)
+PassRefPtrWillBeRawPtr<ServiceWorkerGlobalScope> ServiceWorkerGlobalScope::create(ServiceWorkerThread* thread, PassOwnPtr<WorkerThreadStartupData> startupData)
 {
+    // Note: startupData is finalized on return. After the relevant parts has been
+    // passed along to the created 'context'.
     RefPtrWillBeRawPtr<ServiceWorkerGlobalScope> context = adoptRefWillBeNoop(new ServiceWorkerGlobalScope(startupData->m_scriptURL, startupData->m_userAgent, thread, monotonicallyIncreasingTime(), startupData->m_starterOrigin, startupData->m_workerClients.release()));
 
     context->setV8CacheOptions(startupData->m_v8CacheOptions);