Purge impl-only animations awaiting deletion in AnimationPlayer::UpdateState.

Purge impl-only animations awaiting deletion in AnimationPlayer::UpdateState.

Previously, animations in WAITING_FOR_DELETION state would only be purged via
AnimationPlayer::PushPropertiesTo, which synchronizes impl- and main-thread
players.  But the player in ScrollOffsetAnimationsImpl has no main-thread copy,
so its animations never got deleted after they finished.

BUG=701025
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2757453003
Cr-Commit-Position: refs/heads/master@{#457443}
(cherry picked from commit e26333eb717aa94b9f05ccf34ec91bfe31927f2a)

Review-Url: https://codereview.chromium.org/2756963002 .
Cr-Commit-Position: refs/branch-heads/3029@{#271}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/72d4a9b5ceda4f5cca9c8c91101d92ed051c6b08

[skobes, 2017-03-17 18:18:41]

Description was changed from

==========
Purge impl-only animations awaiting deletion in AnimationPlayer::UpdateState.

Previously, animations in WAITING_FOR_DELETION state would only be purged via
AnimationPlayer::PushPropertiesTo, which synchronizes impl- and main-thread
players.  But the player in ScrollOffsetAnimationsImpl has no main-thread copy,
so its animations never got deleted after they finished.

BUG=701025
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2757453003
Cr-Commit-Position: refs/heads/master@{#457443}
(cherry picked from commit e26333eb717aa94b9f05ccf34ec91bfe31927f2a)
==========

to

==========
Purge impl-only animations awaiting deletion in AnimationPlayer::UpdateState.

Previously, animations in WAITING_FOR_DELETION state would only be purged via
AnimationPlayer::PushPropertiesTo, which synchronizes impl- and main-thread
players.  But the player in ScrollOffsetAnimationsImpl has no main-thread copy,
so its animations never got deleted after they finished.

BUG=701025
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2757453003
Cr-Commit-Position: refs/heads/master@{#457443}
(cherry picked from commit e26333eb717aa94b9f05ccf34ec91bfe31927f2a)

Review-Url: https://codereview.chromium.org/2756963002 .
Cr-Commit-Position: refs/branch-heads/3029@{#271}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/72d4a9b5ceda4f5cca9c8c91101d...
==========

[skobes, 2017-03-17 18:18:42]

Committed patchset #1 (id:1) manually as
72d4a9b5ceda4f5cca9c8c91101d92ed051c6b08.