Update chromeos_build_instructions for GN and clean up.

Update chromeos_build_instructions for GN and clean up.

Adds a note for GYP_CHROMIUM_NO_ACTION=1 and includes a bit of cleanup.

BUG=none

Committed: https://crrev.com/89ee24bb90eeaef13d77175282de565bcfa43a52
Cr-Commit-Position: refs/heads/master@{#388274}

[stevenjb, 2016-04-19 18:30:36]

stevenjb@chromium.org changed reviewers:
+ dpranke@chromium.org, hashimoto@chromium.org

[Dirk Pranke, 2016-04-19 18:34:01]

lgtm

[stevenjb, 2016-04-19 18:37:13]

The CQ bit was checked by stevenjb@chromium.org

[commit-bot: I haz the power, 2016-04-19 18:37:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1902163002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1902163002/1

[commit-bot: I haz the power, 2016-04-19 19:26:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-22 19:14:57]

Description was changed from

==========
Update chromeos_build_instructions for GN and clean up.

Adds a note for GYP_CHROMIUM_NO_ACTION=1 and includes a bit of cleanup.

BUG=none
==========

to

==========
Update chromeos_build_instructions for GN and clean up.

Adds a note for GYP_CHROMIUM_NO_ACTION=1 and includes a bit of cleanup.

BUG=none

Committed: https://crrev.com/89ee24bb90eeaef13d77175282de565bcfa43a52
Cr-Commit-Position: refs/heads/master@{#388274}
==========

[commit-bot: I haz the power, 2016-04-22 19:14:58]

Patchset 1 (id:??) landed as
https://crrev.com/89ee24bb90eeaef13d77175282de565bcfa43a52
Cr-Commit-Position: refs/heads/master@{#388274}