Optimize png files in content

Optimize png files in content

BUG=503732
TBR=avi@chromium.org

Committed: https://crrev.com/bc89440f413972f4ed19a23cc1c9ab1ce67e1e44
Cr-Commit-Position: refs/heads/master@{#336019}

[oshima, 2015-06-24 18:28:39]

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

[commit-bot: I haz the power, 2015-06-24 18:29:32]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1205713003/1

[commit-bot: I haz the power, 2015-06-24 19:38:43]

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

[commit-bot: I haz the power, 2015-06-24 19:38:45]

Dry run: This issue passed the CQ dry run.

[oshima, 2015-06-24 22:05:58]

oshima@chromium.org changed reviewers:
+ avi@chromium.org

[oshima, 2015-06-24 22:07:08]

The CQ bit was checked by oshima@chromium.org

[commit-bot: I haz the power, 2015-06-24 22:08:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1205713003/1

[Avi (use Gerrit), 2015-06-24 22:17:37]

lgtm

[commit-bot: I haz the power, 2015-06-24 22:57:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-24 22:58:32]

Patchset 1 (id:??) landed as
https://crrev.com/bc89440f413972f4ed19a23cc1c9ab1ce67e1e44
Cr-Commit-Position: refs/heads/master@{#336019}