Enable oilpan in modules/mediasource

Source/modules/mediasource/MediaSourceRegistry.cpp

Index: Source/modules/mediasource/MediaSourceRegistry.cpp
diff --git a/Source/modules/mediasource/MediaSourceRegistry.cpp b/Source/modules/mediasource/MediaSourceRegistry.cpp
index ed24dc12e43c4084d0dd8d811cc8c2ce19d62dbd..e9f93871e49d963f685db2da7c206e517beb91fe 100644
--- a/Source/modules/mediasource/MediaSourceRegistry.cpp
+++ b/Source/modules/mediasource/MediaSourceRegistry.cpp
@@ -57,11 +57,11 @@ void MediaSourceRegistry::registerURL(SecurityOrigin*, const KURL& url, URLRegis
 void MediaSourceRegistry::unregisterURL(const KURL& url)
 {
     ASSERT(isMainThread());
-    WillBePersistentHeapHashMap<String, RefPtrWillBeMember<MediaSourceBase> >::iterator iter = m_mediaSources.find(url.string());
+    PersistentHeapHashMap<String, Member<MediaSourceBase> >::iterator iter = m_mediaSources.find(url.string());
     if (iter == m_mediaSources.end())
         return;
 
-    RefPtrWillBeRawPtr<MediaSourceBase> source = iter->value;
+    MediaSourceBase* source = iter->value;
     m_mediaSources.remove(iter);
     source->removedFromRegistry();
 }