Decouple iOS port from ChromeMetricsServiceClient

Decouple iOS port from ChromeMetricsServiceClient

This CL changes the iOS port to use IOSChromeMetricsServiceClient rather than
its forked version of ChromeMetricsServiceClient. There is one intended
functional change in that
ChromeMetricsServiceClient::RecordCommandLineMetrics() was not ported to
IOSChromeMetricsServiceClient; see crbug.com/375794 for details.  Other than
that, there should be no functional changes.

BUG=512421, 375794
Committed: https://crrev.com/ffd40bdeab1188a8a173cb709da44d0559bda650
Cr-Commit-Position: refs/heads/master@{#361103}

[sdefresne, 2015-11-23 15:10:44]

sdefresne@chromium.org changed reviewers:
+ droger@chromium.org

[sdefresne, 2015-11-23 15:10:44]

Please take a look.

blundell: FYI

[sdefresne, 2015-11-23 15:14:54]

Description was changed from

==========
Decouple iOS port from ChromeMetricsServiceClient

This CL changes the iOS port to use IOSChromeMetricsServiceClient rather than
its forked version of ChromeMetricsServiceClient. There is one intended
functional change in that
ChromeMetricsServiceClient::RecordCommandLineMetrics() was not ported to
IOSChromeMetricsServiceClient; see crbug.com/375794 for details.  Other than
that, there should be no functional changes.

BUG=512421, 375794

Review URL: https://chromereviews.googleplex.com/274757013
==========

to

==========
Decouple iOS port from ChromeMetricsServiceClient

This CL changes the iOS port to use IOSChromeMetricsServiceClient rather than
its forked version of ChromeMetricsServiceClient. There is one intended
functional change in that
ChromeMetricsServiceClient::RecordCommandLineMetrics() was not ported to
IOSChromeMetricsServiceClient; see crbug.com/375794 for details.  Other than
that, there should be no functional changes.

BUG=512421, 375794
==========

[droger, 2015-11-23 15:20:01]

The CQ bit was checked by droger@chromium.org

[droger, 2015-11-23 15:20:01]

lgtm

[commit-bot: I haz the power, 2015-11-23 15:20:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1470963002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1470963002/1

[commit-bot: I haz the power, 2015-11-23 15:28:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-23 15:30:21]

Patchset 1 (id:??) landed as
https://crrev.com/ffd40bdeab1188a8a173cb709da44d0559bda650
Cr-Commit-Position: refs/heads/master@{#361103}