Revert of Push API: Add temporary debug log to track down crash

Revert of Push API: Add temporary debug log to track down crash (patchset #2 id:20001 of https://codereview.chromium.org/846473003/)

Reason for revert:
Speculative revert for Android Tests unit_tests failures. 170 tests consistently crashing/failing with nothing printed in the log (ex: https://build.chromium.org/p/chromium.linux/builders/Android%20Tests/builds/17673/steps/unit_tests/logs/stdio

[ RUN      ] BrowsingDataRemoverTest.RemoveMultipleTypes
[ CRASHED      ]
)

Original issue's description:
> Push API: Add temporary debug log to track down crash
>
> Specifically, for https://goto.google.com/gcmdriver-already-instantiated
>
> Sample output:
> [FATAL:gcm_profile_service.cc(155)] An instance of GCMProfileService already exists! Old profile: 0x9e9d75c0 Default 0 0 1 13065207799278578, new profile: 0x9e9d75c0 Default 0 0 1 13065207799278578
>
> BUG=437827
>
> Committed: https://crrev.com/934554c3f369c9821b0af3ae8a09ed55f29eafc9
> Cr-Commit-Position: refs/heads/master@{#310593}

TBR=bauerb@chromium.org,jianli@chromium.org,johnme@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=437827
Committed: https://crrev.com/8cffa4a77d03ec8e83f1704ad052fd5b92875032
Cr-Commit-Position: refs/heads/master@{#310683}

[mattm, 2015-01-09 02:36:38]

Created Revert of Push API: Add temporary debug log to track down crash

[commit-bot: I haz the power, 2015-01-09 02:38:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/839153005/1

[commit-bot: I haz the power, 2015-01-09 02:40:40]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-09 02:41:54]

Patchset 1 (id:??) landed as
https://crrev.com/8cffa4a77d03ec8e83f1704ad052fd5b92875032
Cr-Commit-Position: refs/heads/master@{#310683}