Fix SVG animations which set rx or ry attributes

Earlier to update path on Rect, hasAttribute() was used
to check if the rx or ry attributes are present.
Now it checks if the rx or ry are greater than zero.

BUG=235256
R=pdr@chromium.org

Review URL: https://chromiumcodereview.appspot.com/16914003

git-svn-id: svn://svn.chromium.org/blink/trunk@152376 bbb929c8-8fbe-4397-9dbb-9b2b20218538
4 files changed