Oilpan: move WorkerThreadStartupData to the oilpan heap.

Source/core/workers/WorkerThread.h

Index: Source/core/workers/WorkerThread.h
diff --git a/Source/core/workers/WorkerThread.h b/Source/core/workers/WorkerThread.h
index baef851279e620d4fc8b7779d93f9b4703bc4caa..ccc8b50198e04a725826fae62cb1640164c6e217 100644
--- a/Source/core/workers/WorkerThread.h
+++ b/Source/core/workers/WorkerThread.h
@@ -46,7 +46,7 @@ namespace WebCore {
     class WorkerGlobalScope;
     class WorkerLoaderProxy;
     class WorkerReportingProxy;
-    struct WorkerThreadStartupData;
+    class WorkerThreadStartupData;
 
     enum WorkerThreadStartMode { DontPauseWorkerGlobalScopeOnStart, PauseWorkerGlobalScopeOnStart };
 
@@ -74,10 +74,10 @@ namespace WebCore {
         void setNotificationClient(NotificationClient* client) { m_notificationClient = client; }
 
     protected:
-        WorkerThread(WorkerLoaderProxy&, WorkerReportingProxy&, PassOwnPtr<WorkerThreadStartupData>);
+        WorkerThread(WorkerLoaderProxy&, WorkerReportingProxy&, PassOwnPtrWillBeRawPtr<WorkerThreadStartupData>);
 
         // Factory method for creating a new worker context for the thread.
-        virtual PassRefPtrWillBeRawPtr<WorkerGlobalScope> createWorkerGlobalScope(PassOwnPtr<WorkerThreadStartupData>) = 0;
+        virtual PassRefPtrWillBeRawPtr<WorkerGlobalScope> createWorkerGlobalScope(PassOwnPtrWillBeRawPtr<WorkerThreadStartupData>) = 0;
 
         // Executes the event loop for the worker thread. Derived classes can override to perform actions before/after entering the event loop.
         virtual void runEventLoop();
@@ -98,7 +98,7 @@ namespace WebCore {
         RefPtrWillBePersistent<WorkerGlobalScope> m_workerGlobalScope;
         Mutex m_threadCreationMutex;
 
-        OwnPtr<WorkerThreadStartupData> m_startupData;
+        OwnPtrWillBePersistent<WorkerThreadStartupData> m_startupData;
 
         NotificationClient* m_notificationClient;