Oilpan: move DOM string collection objects to the Oilpan heap.

Source/core/html/HTMLElement.h

Index: Source/core/html/HTMLElement.h
diff --git a/Source/core/html/HTMLElement.h b/Source/core/html/HTMLElement.h
index 7dbe460d2f93808d7d8e297a8f2201d47697b9dc..1004d0b5a0cdd0be2769ae845440c2c637ae2fb9 100644
--- a/Source/core/html/HTMLElement.h
+++ b/Source/core/html/HTMLElement.h
@@ -94,6 +94,8 @@ public:
     virtual bool matchesReadOnlyPseudoClass() const OVERRIDE;
     virtual bool matchesReadWritePseudoClass() const OVERRIDE;
 
+    virtual void trace(Visitor* visitor) OVERRIDE { Element::trace(visitor); }

[Mads Ager (chromium), 2014/04/29 09:05:14]

Do you need to add this, it doesn't change the tracing to have it. Does the
plugin complaint if it is not there?

+
 protected:
     HTMLElement(const QualifiedName& tagName, Document&, ConstructionType);