Move isEmptyValue and emptyValue to SVGCharacterData

third_party/WebKit/Source/core/layout/svg/SVGTextLayoutAttributes.h

 /*
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
  *
  * 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 15 matching lines @@
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
 class LayoutSVGInlineText;
 
 struct SVGCharacterData {
     DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
     SVGCharacterData();
 
+    static float emptyValue() { return std::numeric_limits<float>::quiet_NaN(); }
+    static bool isEmptyValue(float value) { return std::isnan(value); }
+
+    bool hasX() const { return !isEmptyValue(x); }
+    bool hasY() const { return !isEmptyValue(y); }
+    bool hasDx() const { return !isEmptyValue(dx); }
+    bool hasDy() const { return !isEmptyValue(dy); }
+    bool hasRotate() const { return !isEmptyValue(rotate); }
+
     float x;
     float y;
     float dx;
     float dy;
     float rotate;
 };
 
 typedef HashMap<unsigned, SVGCharacterData> SVGCharacterDataMap;
 
 class SVGTextLayoutAttributes {
@@ skipping 10 matching lines @@
 
     SVGCharacterDataMap& characterDataMap() { return m_characterDataMap; }
     const SVGCharacterDataMap& characterDataMap() const { return m_characterDataMap; }
 
 private:
     LayoutSVGInlineText* m_context;
     SVGCharacterDataMap m_characterDataMap;
 };
 
 inline SVGCharacterData::SVGCharacterData()
-    : x(SVGTextLayoutAttributes::emptyValue())
-    , y(SVGTextLayoutAttributes::emptyValue())
-    , dx(SVGTextLayoutAttributes::emptyValue())
-    , dy(SVGTextLayoutAttributes::emptyValue())
-    , rotate(SVGTextLayoutAttributes::emptyValue())
+    : x(emptyValue())
+    , y(emptyValue())
+    , dx(emptyValue())
+    , dy(emptyValue())
+    , rotate(emptyValue())
 {
 }
 
 } // namespace blink
 
 #endif