gn: Document gen's --check flag.

gn: Document gen's --check flag.

BUG=698539
Review-Url: https://codereview.chromium.org/2872453003
Cr-Commit-Position: refs/heads/master@{#470042}
Committed: https://chromium.googlesource.com/chromium/src/+/25e109413ae504e8b7aaf942169fa70d28fde6ed

[Nico, 2017-05-08 14:10:35]

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

[Nico, 2017-05-08 14:10:47]

thakis@chromium.org changed reviewers:
+ brettw@chromium.org

[commit-bot: I haz the power, 2017-05-08 14:10:53]

Dry run: 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, 2017-05-08 14:26:23]

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

[commit-bot: I haz the power, 2017-05-08 14:26:24]

Dry run: This issue passed the CQ dry run.

[brettw, 2017-05-08 17:21:49]

lgtm

[Nico, 2017-05-08 17:45:32]

The CQ bit was checked by thakis@chromium.org

[commit-bot: I haz the power, 2017-05-08 17:46:32]

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, 2017-05-08 17:52:44]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1494265532887350, "parent_rev":
"6bc1dc015b1909479acd8e0f476e55ac33a000ea", "commit_rev":
"25e109413ae504e8b7aaf942169fa70d28fde6ed"}

[commit-bot: I haz the power, 2017-05-08 17:52:58]

Description was changed from

==========
gn: Document gen's --check flag.

BUG=698539
==========

to

==========
gn: Document gen's --check flag.

BUG=698539

Review-Url: https://codereview.chromium.org/2872453003
Cr-Commit-Position: refs/heads/master@{#470042}
Committed:
https://chromium.googlesource.com/chromium/src/+/25e109413ae504e8b7aaf942169f...
==========

[commit-bot: I haz the power, 2017-05-08 17:53:01]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/25e109413ae504e8b7aaf942169f...