Oilpan: add transition types to Navigator and its supplements.

Source/core/frame/Navigator.cpp

Index: Source/core/frame/Navigator.cpp
diff --git a/Source/core/frame/Navigator.cpp b/Source/core/frame/Navigator.cpp
index 1660234415851c742138c74fe9eda1142f1a9f5b..7d9934115e798bbc7874251847b92c8f52b38321 100644
--- a/Source/core/frame/Navigator.cpp
+++ b/Source/core/frame/Navigator.cpp
@@ -129,4 +129,13 @@ void Navigator::getStorageUpdates()
     // FIXME: Remove this method or rename to yieldForStorageUpdates.
 }
 
+void Navigator::trace(Visitor* visitor)
+{
+    visitor->trace(m_plugins);
+    visitor->trace(m_mimeTypes);
+#if ENABLE(OILPAN)
+    HeapSupplementable<Navigator>::trace(visitor);
+#endif
+}
+
 } // namespace WebCore