Suppress the skia-induced failure and a flaky test.

TBR=yurys@chromium.org, scroggo@google.com
BUG=361045

Review URL: https://codereview.chromium.org/336513006

git-svn-id: svn://svn.chromium.org/blink/trunk@176044 bbb929c8-8fbe-4397-9dbb-9b2b20218538