Make SVGLengthMode an enum class

Source/core/svg/SVGLengthList.h

 /*
  * Copyright (C) 2014 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 25 matching lines @@
 #include "core/svg/properties/SVGListPropertyHelper.h"
 
 namespace blink {
 
 class SVGLengthListTearOff;
 
 class SVGLengthList final : public SVGListPropertyHelper<SVGLengthList, SVGLength> {
 public:
     typedef SVGLengthListTearOff TearOffType;
 
-    static PassRefPtrWillBeRawPtr<SVGLengthList> create(SVGLengthMode mode = LengthModeOther)
+    static PassRefPtrWillBeRawPtr<SVGLengthList> create(SVGLengthMode mode = SVGLengthMode::Other)
     {
         return adoptRefWillBeNoop(new SVGLengthList(mode));
     }
 
     virtual ~SVGLengthList();
 
     void setValueAsString(const String&, ExceptionState&);
 
     // SVGPropertyBase:
     virtual PassRefPtrWillBeRawPtr<SVGPropertyBase> cloneForAnimation(const String&) const override;
@@ skipping 15 matching lines @@
 
     template <typename CharType>
     void parseInternal(const CharType*& ptr, const CharType* end, ExceptionState&);
 
     SVGLengthMode m_mode;
 };
 
 } // namespace blink
 
 #endif // SVGLengthList_h