Revert of https://codereview.chromium.org/99533004/
Reason for revert: svg/animations/discard-check-removal-order.html test is flaky 

TBR=dschulze@chromium.org,fmalita@chromium.org,pdr@chromium.org,schenney@chromium.org,rob.buis@samsung.com,ch.dumez@samsung.com,pavan.e@samsung.com
NOTREECHECKS=true
NOTRY=true
BUG=327339

Review URL: https://codereview.chromium.org/136313002

git-svn-id: svn://svn.chromium.org/blink/trunk@164949 bbb929c8-8fbe-4397-9dbb-9b2b20218538