Oilpan: move node/element rare data objects to the heap.

Source/core/dom/shadow/ShadowRoot.cpp

Index: Source/core/dom/shadow/ShadowRoot.cpp
diff --git a/Source/core/dom/shadow/ShadowRoot.cpp b/Source/core/dom/shadow/ShadowRoot.cpp
index e5cd390d5ffeb54f196d852074f4ad32930a83d3..23c3f4a3002799e4dc5584d8e8c9684bdda2eec5 100644
--- a/Source/core/dom/shadow/ShadowRoot.cpp
+++ b/Source/core/dom/shadow/ShadowRoot.cpp
@@ -84,12 +84,12 @@ ShadowRoot::~ShadowRoot()
     // runs so we don't go through TreeScopeAdopter for each child with a
     // destructed tree scope in each descendant.
     removeDetachedChildren();
-#endif
 
     // We must call clearRareData() here since a ShadowRoot class inherits TreeScope
     // as well as Node. See a comment on TreeScope.h for the reason.
     if (hasRareData())
         clearRareData();
+#endif
 }
 
 void ShadowRoot::dispose()