Make SVGLengthMode an enum class

Source/core/svg/LinearGradientAttributes.h

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 11 matching lines @@
 
 #include "core/svg/GradientAttributes.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 struct LinearGradientAttributes : GradientAttributes {
     DISALLOW_ALLOCATION();
 public:
     LinearGradientAttributes()
-        : m_x1(SVGLength::create(LengthModeWidth))
-        , m_y1(SVGLength::create(LengthModeWidth))
-        , m_x2(SVGLength::create(LengthModeWidth))
-        , m_y2(SVGLength::create(LengthModeWidth))
+        : m_x1(SVGLength::create(SVGLengthMode::Width))
+        , m_y1(SVGLength::create(SVGLengthMode::Height))
+        , m_x2(SVGLength::create(SVGLengthMode::Width))
+        , m_y2(SVGLength::create(SVGLengthMode::Height))
         , m_x1Set(false)
         , m_y1Set(false)
         , m_x2Set(false)
         , m_y2Set(false)
     {
         m_x2->setValueAsString("100%", ASSERT_NO_EXCEPTION);
     }
 
     SVGLength* x1() const { return m_x1.get(); }
     SVGLength* y1() const { return m_y1.get(); }
@@ skipping 52 matching lines @@
 
     LinearGradientAttributes m_attributes;
 };
 #endif
 
 } // namespace blink
 
 #endif
 
 // vim:ts=4:noet