Simplify Supplementables post Oilpan.

third_party/WebKit/Source/core/xml/DocumentXSLT.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DocumentXSLT_h
 #define DocumentXSLT_h
 
 #include "core/dom/Document.h"
 #include "platform/heap/Handle.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class Document;
 class ProcessingInstruction;
 
-class DocumentXSLT final : public GarbageCollected<DocumentXSLT>, public HeapSupplement<Document> {
+class DocumentXSLT final : public GarbageCollected<DocumentXSLT>, public Supplement<Document> {
     WTF_MAKE_NONCOPYABLE(DocumentXSLT);
     USING_GARBAGE_COLLECTED_MIXIN(DocumentXSLT);
 public:
     Document* transformSourceDocument()
     {
         return m_transformSourceDocument.get();
     }
 
     void setTransformSourceDocument(Document* document)
     {
         ASSERT(document);
         m_transformSourceDocument = document;
     }
 
-    static DocumentXSLT& from(HeapSupplementable<Document>&);
+    static DocumentXSLT& from(Supplementable<Document>&);
     static const char* supplementName();
 
     // The following static methods don't use any instance of DocumentXSLT.
     // They are just using DocumentXSLT namespace.
     static void applyXSLTransform(Document&, ProcessingInstruction*);
     static ProcessingInstruction* findXSLStyleSheet(Document&);
     static bool processingInstructionInsertedIntoDocument(Document&, ProcessingInstruction*);
     static bool processingInstructionRemovedFromDocument(Document&, ProcessingInstruction*);
     static bool sheetLoaded(Document&, ProcessingInstruction*);
     static bool hasTransformSourceDocument(Document&);
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     DocumentXSLT();
 
     Member<Document> m_transformSourceDocument;
 };
 
 } // namespace blink
 
 #endif