Remove AnimationTimeline pre-finalizer

Remove AnimationTimeline pre-finalizer

Now that Animations have their own pre-finalizers to clean up their
CompositorAnimationPlayers there's no need for AnimationTimeline to
dispose of them.

Committed: https://crrev.com/c9a6c9eca777a42d2341e9ebba19449811968353
Cr-Commit-Position: refs/heads/master@{#408574}

[alancutter (OOO until 2018), 2016-07-28 12:47:21]

alancutter@chromium.org changed reviewers:
+ haraken@chromium.org

[alancutter (OOO until 2018), 2016-07-28 12:47:22]

Changes to AnimationTimeline as discussed in
https://codereview.chromium.org/2188623006.

[haraken, 2016-07-28 12:48:21]

LGTM

Thanks for a lot of iterations!

[alancutter (OOO until 2018), 2016-07-29 02:58:41]

The CQ bit was checked by alancutter@chromium.org

[alancutter (OOO until 2018), 2016-07-29 02:58:42]

The patchset sent to the CQ was uploaded after l-g-t-m from haraken@chromium.org
Link to the patchset: https://codereview.chromium.org/2188993004/#ps20001
(title: "Rebase")

[commit-bot: I haz the power, 2016-07-29 02:58:57]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-29 04:16:35]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-07-29 04:19:20]

Description was changed from

==========
Remove AnimationTimeline pre-finalizer

Now that Animations have their own pre-finalizers to clean up their
CompositorAnimationPlayers there's no need for AnimationTimeline to
dispose of them.
==========

to

==========
Remove AnimationTimeline pre-finalizer

Now that Animations have their own pre-finalizers to clean up their
CompositorAnimationPlayers there's no need for AnimationTimeline to
dispose of them.

Committed: https://crrev.com/c9a6c9eca777a42d2341e9ebba19449811968353
Cr-Commit-Position: refs/heads/master@{#408574}
==========

[commit-bot: I haz the power, 2016-07-29 04:19:22]

Patchset 2 (id:??) landed as
https://crrev.com/c9a6c9eca777a42d2341e9ebba19449811968353
Cr-Commit-Position: refs/heads/master@{#408574}