Add iOS ContextMenu histogram

Add iOS ContextMenu histogram

Chrome on iOS uses the deprecated User Action "MobileContextMenu..." as part of
the upstreaming, it should use the new histogram "ContextMenuOption".
This CL adds the histograms needed by Chrome on iOS.

BUG=669028
Committed: https://crrev.com/01d0304a40a5a7e0bb1da9a1d5fd68b8cd802c0d
Cr-Commit-Position: refs/heads/master@{#434693}

[gambard, 2016-11-28 16:45:52]

gambard@chromium.org changed reviewers:
+ rkaplow@chromium.org

[gambard, 2016-11-28 16:45:52]

PTAL.

[gambard, 2016-11-28 16:47:56]

+newt@ as histogram owner.

[rkaplow, 2016-11-28 17:12:37]

lgtm

[gambard, 2016-11-28 17:13:11]

The CQ bit was checked by gambard@chromium.org

[commit-bot: I haz the power, 2016-11-28 17:13:33]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-28 18:16:52]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480353191240210, "parent_rev":
"545d17dafaa475f08e4c3841ea8acfcde7cecf89", "commit_rev":
"315d5cb13b99a98213790029540d88332425d320"}

[commit-bot: I haz the power, 2016-11-28 18:17:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-28 18:21:21]

Description was changed from

==========
Add iOS ContextMenu histogram

Chrome on iOS uses the deprecated User Action "MobileContextMenu..." as part of
the upstreaming, it should use the new histogram "ContextMenuOption".
This CL adds the histograms needed by Chrome on iOS.

BUG=669028
==========

to

==========
Add iOS ContextMenu histogram

Chrome on iOS uses the deprecated User Action "MobileContextMenu..." as part of
the upstreaming, it should use the new histogram "ContextMenuOption".
This CL adds the histograms needed by Chrome on iOS.

BUG=669028

Committed: https://crrev.com/01d0304a40a5a7e0bb1da9a1d5fd68b8cd802c0d
Cr-Commit-Position: refs/heads/master@{#434693}
==========

[commit-bot: I haz the power, 2016-11-28 18:21:21]

Patchset 1 (id:??) landed as
https://crrev.com/01d0304a40a5a7e0bb1da9a1d5fd68b8cd802c0d
Cr-Commit-Position: refs/heads/master@{#434693}