Remove unused Editor::*SelectionListLevel*(), and ModifySelectionListLevel.{cpp,h}.

Source/core/editing/ModifySelectionListLevel.h

Index: Source/core/editing/ModifySelectionListLevel.h
diff --git a/Source/core/editing/ModifySelectionListLevel.h b/Source/core/editing/ModifySelectionListLevel.h
deleted file mode 100644
index af0cfb42a24ceda09f790ea4c6babe46b084623a..0000000000000000000000000000000000000000
--- a/Source/core/editing/ModifySelectionListLevel.h
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * Copyright (C) 2006, 2010 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
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef ModifySelectionListLevel_h
-#define ModifySelectionListLevel_h
-
-#include "core/editing/CompositeEditCommand.h"
-
-namespace WebCore {
-
-// ModifySelectionListLevelCommand provides functions useful for both increasing and decreasing the list level.
-// It is the base class of IncreaseSelectionListLevelCommand and DecreaseSelectionListLevelCommand.
-// It is not used on its own.
-class ModifySelectionListLevelCommand : public CompositeEditCommand {
-protected:
-    explicit ModifySelectionListLevelCommand(Document&);
-
-    void appendSiblingNodeRange(Node* startNode, Node* endNode, Element* newParent);
-    void insertSiblingNodeRangeBefore(Node* startNode, Node* endNode, Node* refNode);
-    void insertSiblingNodeRangeAfter(Node* startNode, Node* endNode, Node* refNode);
-
-private:
-    virtual bool preservesTypingStyle() const OVERRIDE FINAL;
-};
-
-// IncreaseSelectionListLevelCommand moves the selected list items one level deeper.
-class IncreaseSelectionListLevelCommand FINAL : public ModifySelectionListLevelCommand {
-public:
-    static bool canIncreaseSelectionListLevel(Document&);
-    static PassRefPtr<Node> increaseSelectionListLevel(Document&);
-    static PassRefPtr<Node> increaseSelectionListLevelOrdered(Document&);
-    static PassRefPtr<Node> increaseSelectionListLevelUnordered(Document&);
-
-private:
-    enum Type { InheritedListType, OrderedList, UnorderedList };
-    static PassRefPtr<Node> increaseSelectionListLevel(Document&, Type);
-
-    static PassRefPtr<IncreaseSelectionListLevelCommand> create(Document& document, Type type)
-    {
-        return adoptRef(new IncreaseSelectionListLevelCommand(document, type));
-    }
-
-    IncreaseSelectionListLevelCommand(Document&, Type);
-
-    virtual void doApply() OVERRIDE;
-
-    Type m_listType;
-    RefPtr<Node> m_listElement;
-};
-
-// DecreaseSelectionListLevelCommand moves the selected list items one level shallower.
-class DecreaseSelectionListLevelCommand FINAL : public ModifySelectionListLevelCommand {
-public:
-    static bool canDecreaseSelectionListLevel(Document&);
-    static void decreaseSelectionListLevel(Document&);
-
-private:
-    static PassRefPtr<DecreaseSelectionListLevelCommand> create(Document& document)
-    {
-        return adoptRef(new DecreaseSelectionListLevelCommand(document));
-    }
-
-    explicit DecreaseSelectionListLevelCommand(Document&);
-
-    virtual void doApply() OVERRIDE;
-};
-
-} // namespace WebCore
-
-#endif // ModifySelectionListLevel_h