Oilpan: make Supplementable tracing more regular.

Source/core/frame/LocalFrame.cpp

Index: Source/core/frame/LocalFrame.cpp
diff --git a/Source/core/frame/LocalFrame.cpp b/Source/core/frame/LocalFrame.cpp
index 6aca44404556fa05359978208d7f6f5daea63eec..bde7e3041c0db8d4483a031aa7f78c49ce862538 100644
--- a/Source/core/frame/LocalFrame.cpp
+++ b/Source/core/frame/LocalFrame.cpp
@@ -144,7 +144,6 @@ void LocalFrame::trace(Visitor* visitor)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_destructionObservers);
-#endif
     visitor->trace(m_loader);
     visitor->trace(m_navigationScheduler);
     visitor->trace(m_pagePopupOwner);
@@ -154,8 +153,9 @@ void LocalFrame::trace(Visitor* visitor)
     visitor->trace(m_eventHandler);
     visitor->trace(m_console);
     visitor->trace(m_inputMethodController);
+    HeapSupplementable<LocalFrame>::trace(visitor);
+#endif
     Frame::trace(visitor);
-    WillBeHeapSupplementable<LocalFrame>::trace(visitor);
 }
 
 void LocalFrame::detach()