[SVG] SVGLength{,List} migration to new SVG property impl.

Source/core/svg/SVGTextContentElement.h

Index: Source/core/svg/SVGTextContentElement.h
diff --git a/Source/core/svg/SVGTextContentElement.h b/Source/core/svg/SVGTextContentElement.h
index 75da51fd6a86d48ba8e99ec83e5537a9c07df162..38848d9216d5a0aa4d66efc03adf6216548c0f9b 100644
--- a/Source/core/svg/SVGTextContentElement.h
+++ b/Source/core/svg/SVGTextContentElement.h
@@ -65,6 +65,8 @@ struct SVGPropertyTraits<SVGLengthAdjustType> {
     }
 };
 
+class SVGAnimatedTextLength;
+
 class SVGTextContentElement : public SVGGraphicsElement {
 public:
     // Forward declare enumerations in the W3C naming scheme, for IDL generation.
@@ -86,11 +88,8 @@ public:
 
     static SVGTextContentElement* elementFromRenderer(RenderObject*);
 
-    // textLength is not declared using the standard DECLARE_ANIMATED_LENGTH macro
-    // as its getter needs special handling (return getComputedTextLength(), instead of m_textLength).
-    SVGLength& specifiedTextLength() { return m_specifiedTextLength; }
-    PassRefPtr<SVGAnimatedLength> textLength();
-    static const SVGPropertyInfo* textLengthPropertyInfo();
+    SVGAnimatedLength* textLength() { return m_textLength.get(); }
+    bool textLengthIsSpecifiedByUser() { return m_textLengthIsSpecifiedByUser; }
 
 protected:
     SVGTextContentElement(const QualifiedName&, Document&);
@@ -108,12 +107,8 @@ protected:
 private:
     virtual bool isTextContent() const { return true; }
 
-    // Custom 'textLength' property
-    static void synchronizeTextLength(SVGElement* contextElement);
-    static PassRefPtr<SVGAnimatedProperty> lookupOrCreateTextLengthWrapper(SVGElement* contextElement);
-    mutable SVGSynchronizableAnimatedProperty<SVGLength> m_textLength;
-    SVGLength m_specifiedTextLength;
-
+    RefPtr<SVGAnimatedLength> m_textLength;
+    bool m_textLengthIsSpecifiedByUser;
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGTextContentElement)
         DECLARE_ANIMATED_ENUMERATION(LengthAdjust, lengthAdjust, SVGLengthAdjustType)
     END_DECLARE_ANIMATED_PROPERTIES