InlinedVisitor: Migrate html to use inlined tracing

Source/core/html/shadow/DateTimeEditElement.h

 /*
  * Copyright (C) 2012 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 64 matching lines @@
         LayoutParameters(Locale& locale, const StepRange& stepRange)
             : locale(locale)
             , stepRange(stepRange)
         {
         }
     };
 
     static PassRefPtrWillBeRawPtr<DateTimeEditElement> create(Document&, EditControlOwner&);
 
     virtual ~DateTimeEditElement();
-    virtual void trace(Visitor*) override;
+    DECLARE_VIRTUAL_TRACE();
 
     void addField(PassRefPtrWillBeRawPtr<DateTimeFieldElement>);
     bool anyEditableFieldsHaveValues() const;
     void blurByOwner();
     virtual void defaultEventHandler(Event*) override;
     void disabledStateChanged();
     Element* fieldsWrapperElement() const;
     void focusIfNoFocus();
     // If oldFocusedNode is one of sub-fields, focus on it. Otherwise focus on
     // the first sub-field.
@@ skipping 55 matching lines @@
     WillBeHeapVector<RawPtrWillBeMember<DateTimeFieldElement>, maximumNumberOfFields> m_fields;
     RawPtrWillBeMember<EditControlOwner> m_editControlOwner;
 };
 
 DEFINE_TYPE_CASTS(DateTimeEditElement, Element, element, element->isDateTimeEditElement(), element.isDateTimeEditElement());
 
 } // namespace blink
 
 #endif
 #endif