Set "auto" as default for rx and ry

third_party/WebKit/LayoutTests/animations/interpolation/svg-rx-interpolation.html

Index: third_party/WebKit/LayoutTests/animations/interpolation/svg-rx-interpolation.html
diff --git a/third_party/WebKit/LayoutTests/animations/interpolation/svg-rx-interpolation.html b/third_party/WebKit/LayoutTests/animations/interpolation/svg-rx-interpolation.html
index a481e62b48aa9f17f26381f20b63dfc978ef6fda..979fd77b4061efa0f7f71af7ebc320258d7da910 100644
--- a/third_party/WebKit/LayoutTests/animations/interpolation/svg-rx-interpolation.html
+++ b/third_party/WebKit/LayoutTests/animations/interpolation/svg-rx-interpolation.html
@@ -36,18 +36,11 @@ assertInterpolation({
   {at: 1.5, is: '25px'},
 ]);
 
-assertInterpolation({
+assertNoInterpolation({
   property: 'rx',
   from: 'initial',
   to: '20px',
-}, [
-  {at: -0.3, is: '0px'},
-  {at: 0, is: '0px'},
-  {at: 0.3, is: '6px'},
-  {at: 0.6, is: '12px'},
-  {at: 1, is: '20px'},
-  {at: 1.5, is: '30px'},
-]);
+});
 
 assertInterpolation({
   property: 'rx',
@@ -62,18 +55,11 @@ assertInterpolation({
   {at: 1.5, is: '15px'},
 ]);
 
-assertInterpolation({
+assertNoInterpolation({
   property: 'rx',
   from: 'unset',
   to: '20px',
-}, [
-  {at: -0.3, is: '0px'},
-  {at: 0, is: '0px'},
-  {at: 0.3, is: '6px'},
-  {at: 0.6, is: '12px'},
-  {at: 1, is: '20px'},
-  {at: 1.5, is: '30px'},
-]);
+});
 
 assertInterpolation({
   property: 'rx',