Remove getNodesInCommand debug method from Editing commands

Source/core/editing/EditCommand.h

 /*
  * Copyright (C) 2005, 2006, 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 65 matching lines @@
 enum ShouldAssumeContentIsAlwaysEditable {
     AssumeContentIsAlwaysEditable,
     DoNotAssumeContentIsAlwaysEditable,
 };
 
 class SimpleEditCommand : public EditCommand {
 public:
     virtual void doUnapply() = 0;
     virtual void doReapply(); // calls doApply()
 
-#ifndef NDEBUG
-    virtual void getNodesInCommand(HashSet<Node*>&) = 0;
-#endif
-
 protected:
     explicit SimpleEditCommand(Document& document) : EditCommand(document) { }
 
-#ifndef NDEBUG
-    void addNodeAndDescendants(Node*, HashSet<Node*>&);
-#endif
-
 private:
     virtual bool isSimpleEditCommand() const OVERRIDE { return true; }
 };
 
 inline SimpleEditCommand* toSimpleEditCommand(EditCommand* command)
 {
     ASSERT(command);
     ASSERT_WITH_SECURITY_IMPLICATION(command->isSimpleEditCommand());
     return static_cast<SimpleEditCommand*>(command);
 }
 
 } // namespace WebCore
 
 #endif // EditCommand_h