Remove spurious prints from GC logging

Remove spurious prints from GC logging

R=hpayer@chromium.org, szager@chromium.org
TBR=hpayer@chromium.org
BUG=

Committed: https://crrev.com/adf42dd0071a9b8b398573e59ef553ad28615e38
Cr-Commit-Position: refs/heads/master@{#28707}

[Erik Corry Chromium.org, 2015-05-30 21:23:20]

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

[commit-bot: I haz the power, 2015-05-30 21:23:24]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1149413003/1

[commit-bot: I haz the power, 2015-05-30 22:03:08]

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

[commit-bot: I haz the power, 2015-05-30 22:03:10]

Dry run: This issue passed the CQ dry run.

[Toon Verwaest, 2015-05-31 09:59:42]

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

[Toon Verwaest, 2015-05-31 09:59:42]

lgtm

[Toon Verwaest, 2015-05-31 10:00:15]

The CQ bit was checked by verwaest@chromium.org

[commit-bot: I haz the power, 2015-05-31 10:00:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1149413003/1

[commit-bot: I haz the power, 2015-05-31 10:02:03]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-31 10:02:19]

Patchset 1 (id:??) landed as
https://crrev.com/adf42dd0071a9b8b398573e59ef553ad28615e38
Cr-Commit-Position: refs/heads/master@{#28707}