Add directly composited image dynamic CSS filter test

No test coverage of this case, so add it. Create a directly composited
image (layered image), then dynamically apply a CSS filter style. Test
that the image renders with the filter style.

Layout test: css3/filters/direct-image-dynamic-filter.html

BUG=405803

Review URL: https://codereview.chromium.org/497953002

git-svn-id: svn://svn.chromium.org/blink/trunk@180826 bbb929c8-8fbe-4397-9dbb-9b2b20218538