Fix Javascript bugs in animation LayoutTests

Fix Javascript bugs in animation LayoutTests

These tests were hitting unintended exceptions in their test code.
This patch corrects their errors.

BUG=602886
Committed: https://crrev.com/af8ba97cd1a395bb097493d819cef8ea1888d447
Cr-Commit-Position: refs/heads/master@{#386946}

[alancutter (OOO until 2018), 2016-04-13 07:18:11]

Description was changed from

==========
+fixAnimationTestErrors

BUG=
==========

to

==========
Fix Javascript bugs in animation LayoutTests

These tests were hitting unintended exceptions in their test code.
This patch corrects their errors.

BUG=602886
==========

[alancutter (OOO until 2018), 2016-04-13 07:18:11]

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

[alancutter (OOO until 2018), 2016-04-13 07:18:20]

The CQ bit was checked by alancutter@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-04-13 07:18:32]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1882383002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1882383002/20001

[Eric Willigers, 2016-04-13 07:28:51]

lgtm

[alancutter (OOO until 2018), 2016-04-13 07:34:35]

The CQ bit was unchecked by alancutter@chromium.org

[alancutter (OOO until 2018), 2016-04-13 07:34:38]

The CQ bit was checked by alancutter@chromium.org

[commit-bot: I haz the power, 2016-04-13 07:34:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1882383002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1882383002/20001

[commit-bot: I haz the power, 2016-04-13 09:21:20]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-04-13 09:22:54]

Description was changed from

==========
Fix Javascript bugs in animation LayoutTests

These tests were hitting unintended exceptions in their test code.
This patch corrects their errors.

BUG=602886
==========

to

==========
Fix Javascript bugs in animation LayoutTests

These tests were hitting unintended exceptions in their test code.
This patch corrects their errors.

BUG=602886

Committed: https://crrev.com/af8ba97cd1a395bb097493d819cef8ea1888d447
Cr-Commit-Position: refs/heads/master@{#386946}
==========

[commit-bot: I haz the power, 2016-04-13 09:22:55]

Patchset 2 (id:??) landed as
https://crrev.com/af8ba97cd1a395bb097493d819cef8ea1888d447
Cr-Commit-Position: refs/heads/master@{#386946}