Make the canvas in race layout test smaller

Make the canvas in race layout test smaller

BUG=536293
Committed: https://crrev.com/db8e0663bba7dc9b484324a2d527e047fa5493ee
Cr-Commit-Position: refs/heads/master@{#351121}

[xlai (Olivia), 2015-09-28 14:29:56]

xlai@chromium.org changed reviewers:
+ junov@chromium.org

[xlai (Olivia), 2015-09-28 14:43:37]

Tried the MSAN trybots and they are green. But apparently these trybots do not
perform webkit tests...

[xlai (Olivia), 2015-09-28 16:59:51]

On 2015/09/28 14:43:37, Olivia wrote:
> Tried the MSAN trybots and they are green. But apparently these trybots do not
> perform webkit tests...

lgtm

[weiliangc, 2015-09-28 17:01:27]

weiliangc@chromium.org changed reviewers:
+ weiliangc@chromium.org

[weiliangc, 2015-09-28 17:01:27]

lgtm

[xlai (Olivia), 2015-09-28 17:02:00]

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

[commit-bot: I haz the power, 2015-09-28 17:04:23]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1375573002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1375573002/1

[commit-bot: I haz the power, 2015-09-28 19:02:31]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-09-28 19:02:32]

Dry run: This issue passed the CQ dry run.

[xlai (Olivia), 2015-09-28 19:06:28]

The CQ bit was checked by xlai@chromium.org

[commit-bot: I haz the power, 2015-09-28 19:14:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1375573002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1375573002/1

[commit-bot: I haz the power, 2015-09-28 19:40:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-28 19:41:36]

Patchset 1 (id:??) landed as
https://crrev.com/db8e0663bba7dc9b484324a2d527e047fa5493ee
Cr-Commit-Position: refs/heads/master@{#351121}