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

Source/modules/serviceworkers/ServiceWorkerScriptCachedMetadataHandler.cpp

Index: Source/modules/serviceworkers/ServiceWorkerScriptCachedMetadataHandler.cpp
diff --git a/Source/modules/serviceworkers/ServiceWorkerScriptCachedMetadataHandler.cpp b/Source/modules/serviceworkers/ServiceWorkerScriptCachedMetadataHandler.cpp
index d53961c1989c57b3af22c5865d6273334e3ad0e1..6a9d3340728a0fa405fde255fe43cf598f007d12 100644
--- a/Source/modules/serviceworkers/ServiceWorkerScriptCachedMetadataHandler.cpp
+++ b/Source/modules/serviceworkers/ServiceWorkerScriptCachedMetadataHandler.cpp
@@ -23,6 +23,14 @@ ServiceWorkerScriptCachedMetadataHandler::~ServiceWorkerScriptCachedMetadataHand
 {
 }
 
+DEFINE_TRACE(ServiceWorkerScriptCachedMetadataHandler)
+{
+#if ENABLE(OILPAN)
+    visitor->trace(m_workerGlobalScope);
+#endif
+    CachedMetadataHandler::trace(visitor);
+}
+
 void ServiceWorkerScriptCachedMetadataHandler::setCachedMetadata(unsigned dataTypeID, const char* data, size_t size, CacheType type)
 {
     if (type != SendToPlatform)