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

LayoutTests/resources/js-test.js

Index: LayoutTests/resources/js-test.js
diff --git a/LayoutTests/resources/js-test.js b/LayoutTests/resources/js-test.js
index 016c67f8ae3a08edfc76dfa59dd2afb4b86d87e9..c94f5740c3e55cc54818177f2f847cf71885b207 100644
--- a/LayoutTests/resources/js-test.js
+++ b/LayoutTests/resources/js-test.js
@@ -158,12 +158,20 @@ function isMinusZero(n)
     return n === 0 && 1/n < 0;
 }
 
+function isNewSVGTearOffType(v)
+{
+    return ['[object SVGLength]', '[object SVGLengthList]'].indexOf(""+v) != -1;
+}
+
 function isResultCorrect(actual, expected)
 {
     if (expected === 0)
         return actual === expected && (1/actual) === (1/expected);
     if (actual === expected)
         return true;
+    // http://crbug.com/308818 : The new implementation of SVGListProperties do not necessary return the same wrapper object, so === operator would not work. We compare for their string representation instead.
+    if (isNewSVGTearOffType(expected) && typeof(expected) == typeof(actual) && actual.valueAsString == expected.valueAsString)
+        return true;
     if (typeof(expected) == "number" && isNaN(expected))
         return typeof(actual) == "number" && isNaN(actual);
     if (expected && (Object.prototype.toString.call(expected) == Object.prototype.toString.call([])))
@@ -173,6 +181,8 @@ function isResultCorrect(actual, expected)
 
 function stringify(v)
 {
+    if (isNewSVGTearOffType(v))
+        return v.valueAsString;
     if (v === 0 && 1/v < 0)
         return "-0";
     else return "" + v;