SVGTests should lazyAttach

SVGTests::handleAttributeChange should use lazyAttach instead of calling
attach manually.

Review URL: https://chromiumcodereview.appspot.com/15398006

git-svn-id: svn://svn.chromium.org/blink/trunk@150822 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed