Oilpan: leave out TreeScope::dispose().

Source/core/dom/TreeScope.h

Index: Source/core/dom/TreeScope.h
diff --git a/Source/core/dom/TreeScope.h b/Source/core/dom/TreeScope.h
index 1e5efcf2f1debf28b4631f75cd06cdcb6b9285e5..1f525e4cfcddbcb496a768c453df6d53d3278744 100644
--- a/Source/core/dom/TreeScope.h
+++ b/Source/core/dom/TreeScope.h
@@ -98,7 +98,6 @@ public:
 
     IdTargetObserverRegistry& idTargetObserverRegistry() const { return *m_idTargetObserverRegistry.get(); }
 
-
 #if !ENABLE(OILPAN)
     // Nodes belonging to this scope hold guard references -
     // these are enough to keep the scope from being destroyed, but
@@ -158,9 +157,9 @@ protected:
     void setNeedsStyleRecalcForViewportUnits();
 
 private:
+#if !ENABLE(OILPAN)
     virtual void dispose() { }
 
-#if !ENABLE(OILPAN)
     int refCount() const;
 
 #if ENABLE(SECURITY_ASSERT)