Gardening: mark svg/custom/repaint-moving-svg-and-div.xhtml as flaky on all platforms

BUG=377660
TBR=esprehn

Review URL: https://codereview.chromium.org/300143004

git-svn-id: svn://svn.chromium.org/blink/trunk@174846 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Web Animations: Rename AnimationSource to AnimationNode

Review URL: https://codereview.chromium.org/303553002

git-svn-id: svn://svn.chromium.org/blink/trunk@174847 bbb929c8-8fbe-4397-9dbb-9b2b20218538