[SVG2] Add getters and setters to SVG*List interfaces.

Source/core/animation/AnimatableValueTestHelper.cpp

 /*
  * Copyright (c) 2013, 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 126 matching lines @@
 
 void PrintTo(const AnimatableShapeValue& animValue, ::std::ostream* os)
 {
     *os << "AnimatableShapeValue@" << &animValue;
 }
 
 void PrintTo(const AnimatableStrokeDasharrayList& animValue, ::std::ostream* os)
 {
     *os << "AnimatableStrokeDasharrayList(";
     RefPtr<SVGLengthList> list = animValue.toSVGLengthList();
-    size_t length = list->numberOfItems();
+    size_t length = list->length();
     for (size_t i = 0; i < length; ++i) {
         *os << list->at(i)->valueAsString().utf8().data();
         if (i != length-1)
             *os << ", ";
     }
     *os << ")";
 }
 
 void PrintTo(const AnimatableTransform& animTransform, ::std::ostream* os)
 {
@@ skipping 103 matching lines @@
         PrintTo(*(toAnimatableTransform(&animValue)), os);
     else if (animValue.isUnknown())
         PrintTo(*(toAnimatableUnknown(&animValue)), os);
     else if (animValue.isVisibility())
         PrintTo(*(toAnimatableVisibility(&animValue)), os);
     else
         *os << "Unknown AnimatableValue - update ifelse chain in AnimatableValueTestHelper.h";
 }
 
 } // namespace WebCore