HeapSupplements are now just Supplements.

third_party/WebKit/Source/modules/webmidi/MIDIController.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 22 matching lines @@
 
 #include "core/frame/LocalFrame.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class MIDIAccessInitializer;
 class MIDIClient;
 class MIDIOptions;
 
-class MIDIController final : public GarbageCollectedFinalized<MIDIController>, public HeapSupplement<LocalFrame> {
+class MIDIController final : public GarbageCollectedFinalized<MIDIController>, public Supplement<LocalFrame> {
     USING_GARBAGE_COLLECTED_MIXIN(MIDIController);
 public:
     virtual ~MIDIController();
 
     void requestPermission(MIDIAccessInitializer*, const MIDIOptions&);
     void cancelPermissionRequest(MIDIAccessInitializer*);
 
     static RawPtr<MIDIController> create(PassOwnPtr<MIDIClient>);
     static const char* supplementName();
-    static MIDIController* from(LocalFrame* frame) { return static_cast<MIDIController*>(HeapSupplement<LocalFrame>::from(frame, supplementName())); }
+    static MIDIController* from(LocalFrame* frame) { return static_cast<MIDIController*>(Supplement<LocalFrame>::from(frame, supplementName())); }
 
-    DEFINE_INLINE_VIRTUAL_TRACE() { HeapSupplement<LocalFrame>::trace(visitor); }
+    DEFINE_INLINE_VIRTUAL_TRACE() { Supplement<LocalFrame>::trace(visitor); }
 
 protected:
     explicit MIDIController(PassOwnPtr<MIDIClient>);
 
 private:
     OwnPtr<MIDIClient> m_client;
 };
 
 } // namespace blink
 
 #endif // MIDIController_h