Replace directly use of DriveIntegrationService to drive::util::GetXxxByProfile.

Replace directly use of DriveIntegrationService to drive::util::Get{DriveService,FileSystem}ByProfile.

As preparation to start returning DriveIntegrationService instance always by
DriveIntegrationServiceFactory::GetForProfile, this reduces its direct
usage.

BUG=284972
TEST=Ran unit_tests
R=satorux@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=221367

[hidehiko, 2013-09-04 17:55:13]

This is based on 23523022.
Thank you for your review in advance,
- hidehiko

[satorux1, 2013-09-05 01:38:15]

LGTM

[commit-bot: I haz the power, 2013-09-05 02:22:48]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hidehiko@chromium.org/23531027/1

[commit-bot: I haz the power, 2013-09-05 03:04:44]

Retried try job too often on ios_dbg_simulator for step(s) ui_unittests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=ios_dbg_si...

[commit-bot: I haz the power, 2013-09-05 03:07:59]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hidehiko@chromium.org/23531027/1

[commit-bot: I haz the power, 2013-09-05 06:50:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hidehiko@chromium.org/23531027/1

[commit-bot: I haz the power, 2013-09-05 07:21:35]

Retried try job too often on ios_dbg_simulator for step(s) ui_unittests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=ios_dbg_si...

[hidehiko, 2013-09-05 08:32:30]

Committed patchset #1 manually as r221367 (presubmit successful).