Oilpan: Move CachedMetadataHandler to Oilpan heap on Oilpan-enabled world.

Source/core/workers/WorkerThread.cpp

Index: Source/core/workers/WorkerThread.cpp
diff --git a/Source/core/workers/WorkerThread.cpp b/Source/core/workers/WorkerThread.cpp
index 2cf6a12bd392db2f2028fe1b5109a5e464dd02e4..0b593b05b79286993501a9abcd5afab6b3065041 100644
--- a/Source/core/workers/WorkerThread.cpp
+++ b/Source/core/workers/WorkerThread.cpp
@@ -246,7 +246,7 @@ void WorkerThread::initialize(PassOwnPtr<WorkerThreadStartupData> startupData)
         script->initializeContextIfNeeded();
     m_workerGlobalScope->workerInspectorController()->workerContextInitialized(startMode == PauseWorkerGlobalScopeOnStart);
 
-    OwnPtr<CachedMetadataHandler> handler(workerGlobalScope()->createWorkerScriptCachedMetadataHandler(scriptURL, cachedMetaData.get()));
+    OwnPtrWillBeRawPtr<CachedMetadataHandler> handler(workerGlobalScope()->createWorkerScriptCachedMetadataHandler(scriptURL, cachedMetaData.get()));
     bool success = script->evaluate(ScriptSourceCode(sourceCode, scriptURL), nullptr, handler.get(), v8CacheOptions);
     m_workerGlobalScope->didEvaluateWorkerScript();
     m_workerReportingProxy.didEvaluateWorkerScript(success);