Make video encoder/decoder test faster

Make video encoder/decoder test faster

Reduced size of the frames used in the tests to make them faster.
Previously all Video tests in remoting_unittests were taking more than
10 seconds, now thay take less than 4

BUG=514404
Committed: https://crrev.com/fc59cb43df0e4eb77bc2916ab37d36598eabd4f2
Cr-Commit-Position: refs/heads/master@{#341206}

[Sergey Ulanov, 2015-07-29 22:13:54]

sergeyu@chromium.org changed reviewers:
+ jamiewalch@chromium.org

[Jamie, 2015-07-29 23:36:01]

LGTM, but please also remove the suppression added by
https://codereview.chromium.org/1254203005 (in this CL, or a follow-up).

[Sergey Ulanov, 2015-07-30 16:10:49]

The CQ bit was checked by sergeyu@chromium.org

[commit-bot: I haz the power, 2015-07-30 16:10:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1264743002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1264743002/1

[Sergey Ulanov, 2015-07-30 16:11:19]

On 2015/07/29 23:36:01, Jamie wrote:
> LGTM, but please also remove the suppression added by
> https://codereview.chromium.org/1254203005 (in this CL, or a follow-up).

I wanted to do it in a separate CL.

[commit-bot: I haz the power, 2015-07-30 16:28:40]

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

[commit-bot: I haz the power, 2015-07-30 16:28:41]

Try jobs failed on following builders:
  linux_chromium_asan_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Sergey Ulanov, 2015-07-30 21:55:44]

The CQ bit was checked by sergeyu@chromium.org

[Sergey Ulanov, 2015-07-30 21:55:44]

The patchset sent to the CQ was uploaded after l-g-t-m from
jamiewalch@chromium.org
Link to the patchset: https://codereview.chromium.org/1264743002/#ps20001
(title: "Fix ASan failure")

[commit-bot: I haz the power, 2015-07-30 21:56:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1264743002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1264743002/20001

[commit-bot: I haz the power, 2015-07-30 22:19:34]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-07-30 22:20:18]

Patchset 2 (id:??) landed as
https://crrev.com/fc59cb43df0e4eb77bc2916ab37d36598eabd4f2
Cr-Commit-Position: refs/heads/master@{#341206}