Make the execCommand() userInterface argument explicitly do nothing

Source/core/editing/Editor.h

 /*
  * Copyright (C) 2006, 2007, 2008 Apple 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 36 matching lines @@
 class EditorInternalCommand;
 class LocalFrame;
 class HitTestResult;
 class KillRing;
 class Pasteboard;
 class SpellChecker;
 class StylePropertySet;
 class TextEvent;
 class UndoStack;
 
-enum EditorCommandSource { CommandFromMenuOrKeyBinding, CommandFromDOM, CommandFromDOMWithUserInterface };
+enum EditorCommandSource { CommandFromMenuOrKeyBinding, CommandFromDOM };
 enum EditorParagraphSeparator { EditorParagraphSeparatorIsDiv, EditorParagraphSeparatorIsP };
 
 class Editor final : public NoBaseWillBeGarbageCollectedFinalized<Editor> {
     WTF_MAKE_NONCOPYABLE(Editor);
 public:
     static PassOwnPtrWillBeRawPtr<Editor> create(LocalFrame&);
     ~Editor();
 
     EditorClient& client() const;
 
@@ skipping 232 matching lines @@
 
 inline bool Editor::markedTextMatchesAreHighlighted() const
 {
     return m_areMarkedTextMatchesHighlighted;
 }
 
 
 } // namespace blink
 
 #endif // Editor_h