cc: Remove remaining calls to LayerImpl::child_at in LayerTreeTests

cc: Remove remaining calls to LayerImpl::child_at in LayerTreeTests

There were two LayerTreeTests still making calls to LayerImpl::child_at.
This CL replaces those calls with calls to LayerTreeImpl::LayerById.

BUG=604467
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/8587a0b3356d604d5f6f382a2a33f8dc31935dbb
Cr-Commit-Position: refs/heads/master@{#392084}

[ajuma, 2016-05-06 00:09:54]

Description was changed from

==========
cc: Remove remaining calls to LayerImpl::child_at in LayerTreeTests

There were two LayerTreeTests still making calls to LayerImpl::child_at.
This CL replaces those calls with calls to LayerTreeImpl::LayerById.

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

to

==========
cc: Remove remaining calls to LayerImpl::child_at in LayerTreeTests

There were two LayerTreeTests still making calls to LayerImpl::child_at.
This CL replaces those calls with calls to LayerTreeImpl::LayerById.

BUG=
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
==========

[ajuma, 2016-05-06 13:21:58]

Description was changed from

==========
cc: Remove remaining calls to LayerImpl::child_at in LayerTreeTests

There were two LayerTreeTests still making calls to LayerImpl::child_at.
This CL replaces those calls with calls to LayerTreeImpl::LayerById.

BUG=
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
==========

to

==========
cc: Remove remaining calls to LayerImpl::child_at in LayerTreeTests

There were two LayerTreeTests still making calls to LayerImpl::child_at.
This CL replaces those calls with calls to LayerTreeImpl::LayerById.

BUG=604467
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
==========

[ajuma, 2016-05-06 13:21:58]

ajuma@chromium.org changed reviewers:
+ jaydasika@chromium.org, weiliangc@chromium.org

[jaydasika, 2016-05-06 16:20:52]

On 2016/05/06 13:23:09, ajuma wrote:

lgtm

[ajuma, 2016-05-06 17:06:03]

The CQ bit was checked by ajuma@chromium.org

[commit-bot: I haz the power, 2016-05-06 17:06:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1952413002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1952413002/20001

[commit-bot: I haz the power, 2016-05-06 17:14:45]

Description was changed from

==========
cc: Remove remaining calls to LayerImpl::child_at in LayerTreeTests

There were two LayerTreeTests still making calls to LayerImpl::child_at.
This CL replaces those calls with calls to LayerTreeImpl::LayerById.

BUG=604467
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
==========

to

==========
cc: Remove remaining calls to LayerImpl::child_at in LayerTreeTests

There were two LayerTreeTests still making calls to LayerImpl::child_at.
This CL replaces those calls with calls to LayerTreeImpl::LayerById.

BUG=604467
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
==========

[commit-bot: I haz the power, 2016-05-06 17:14:46]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-05-06 17:16:14]

Description was changed from

==========
cc: Remove remaining calls to LayerImpl::child_at in LayerTreeTests

There were two LayerTreeTests still making calls to LayerImpl::child_at.
This CL replaces those calls with calls to LayerTreeImpl::LayerById.

BUG=604467
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
==========

to

==========
cc: Remove remaining calls to LayerImpl::child_at in LayerTreeTests

There were two LayerTreeTests still making calls to LayerImpl::child_at.
This CL replaces those calls with calls to LayerTreeImpl::LayerById.

BUG=604467
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/8587a0b3356d604d5f6f382a2a33f8dc31935dbb
Cr-Commit-Position: refs/heads/master@{#392084}
==========

[commit-bot: I haz the power, 2016-05-06 17:16:15]

Patchset 2 (id:??) landed as
https://crrev.com/8587a0b3356d604d5f6f382a2a33f8dc31935dbb
Cr-Commit-Position: refs/heads/master@{#392084}