Oilpan: adjust AnimationTimeline finalization.
With Oilpan, explicitly disconnecting its animation players is not needed;
the ExecutionContext's weak reference will be transparently take care of
this instead.
While here, merge the timeline finalization steps into a detach operation
for AnimationPlayer.
TBR=dstockwell,oilpan-reviews
BUG=472307
Review URL: https://codereview.chromium.org/1080523002
git-svn-id: svn://svn.chromium.org/blink/trunk@193552 bbb929c8-8fbe-4397-9dbb-9b2b20218538
3 files changed