Merge from Chromium at DEPS revision 257591

This commit was generated by merge_to_master.py.

Change-Id: I834f3ca85c1ef7ec2c1061847a3d92aa461da043
diff --git a/Source/core/svg/SVGAnimatedTransformList.idl b/Source/core/svg/SVGAnimatedTransformList.idl
index 718a2a6..7a56c32 100644
--- a/Source/core/svg/SVGAnimatedTransformList.idl
+++ b/Source/core/svg/SVGAnimatedTransformList.idl
@@ -23,8 +23,9 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-interface SVGAnimatedTransformList {
+[
+    SetWrapperReferenceTo(SVGElement contextElement),
+] interface SVGAnimatedTransformList {
     readonly attribute SVGTransformList baseVal;
     readonly attribute SVGTransformList animVal;
 };
-