InlinedVisitor: Migrate html to use inlined tracing

Source/core/html/DOMFormData.cpp

 /*
  * Copyright (C) 2010 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 43 matching lines @@
         key = entry.name();
         if (entry.isString())
             value.setUSVString(entry.string());
         else if (entry.isFile())
             value.setFile(entry.file());
         else
             ASSERT_NOT_REACHED();
         return true;
     }
 
-    void trace(Visitor* visitor) override
+    DEFINE_INLINE_VIRTUAL_TRACE()
     {
         visitor->trace(m_formData);
         PairIterable<String, FormDataEntryValue>::IterationSource::trace(visitor);
     }
 
 private:
     const RefPtrWillBeMember<DOMFormData> m_formData;
     size_t m_current;
 };
 
@@ skipping 67 matching lines @@
 {
     setBlob(name, blob, filename);
 }
 
 PairIterable<String, FormDataEntryValue>::IterationSource* DOMFormData::startIteration(ScriptState*, ExceptionState&)
 {
     return new DOMFormDataIterationSource(this);
 }
 
 } // namespace blink