Move isEmptyValue and emptyValue to SVGCharacterData

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

Index: third_party/WebKit/Source/core/layout/svg/SVGTextLayoutAttributes.h
diff --git a/third_party/WebKit/Source/core/layout/svg/SVGTextLayoutAttributes.h b/third_party/WebKit/Source/core/layout/svg/SVGTextLayoutAttributes.h
index 88c419ef86bef50a9962599643dc7a1d29dc07e2..27d81c7665cd95cf17f82f7cbc1b4bfbf53746e9 100644
--- a/third_party/WebKit/Source/core/layout/svg/SVGTextLayoutAttributes.h
+++ b/third_party/WebKit/Source/core/layout/svg/SVGTextLayoutAttributes.h
@@ -33,6 +33,15 @@ 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;
@@ -63,11 +72,11 @@ private:
 };
 
 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())
 {
 }