Oilpan: fix WorkerThreadStartupData finalization handling.

Source/core/workers/DedicatedWorkerGlobalScope.cpp

Index: Source/core/workers/DedicatedWorkerGlobalScope.cpp
diff --git a/Source/core/workers/DedicatedWorkerGlobalScope.cpp b/Source/core/workers/DedicatedWorkerGlobalScope.cpp
index 5ca73f381775af8613c36a81b39091d7409e1ccc..921c96867b8bb40113f13da33576d478b918bc48 100644
--- a/Source/core/workers/DedicatedWorkerGlobalScope.cpp
+++ b/Source/core/workers/DedicatedWorkerGlobalScope.cpp
@@ -41,8 +41,10 @@
 
 namespace blink {
 
-PassRefPtrWillBeRawPtr<DedicatedWorkerGlobalScope> DedicatedWorkerGlobalScope::create(DedicatedWorkerThread* thread, PassOwnPtrWillBeRawPtr<WorkerThreadStartupData> startupData, double timeOrigin)
+PassRefPtrWillBeRawPtr<DedicatedWorkerGlobalScope> DedicatedWorkerGlobalScope::create(DedicatedWorkerThread* thread, PassOwnPtr<WorkerThreadStartupData> startupData, double timeOrigin)
 {
+    // Note: startupData is finalized on return. After the relevant parts has been
+    // passed along to the created 'context'.
     RefPtrWillBeRawPtr<DedicatedWorkerGlobalScope> context = adoptRefWillBeNoop(new DedicatedWorkerGlobalScope(startupData->m_scriptURL, startupData->m_userAgent, thread, timeOrigin, startupData->m_starterOrigin, startupData->m_workerClients.release()));
     context->applyContentSecurityPolicyFromString(startupData->m_contentSecurityPolicy, startupData->m_contentSecurityPolicyType);
     return context.release();