GN: Get os="chromeos" use_ozone=true to compile

GN: Get os="chromeos" use_ozone=true to compile

There were a number of ozone targets that had rusted or never
been implemented in the GN build for Chrome OS. Fix it!

R=cmasone
TBR=brettw
BUG=424334
TEST=build chrome with os=chromeos use_ozone=true use_clang=true

Committed: https://crrev.com/acd282e852c15ea7b3dd1d09252dbe9f66578f2c
Cr-Commit-Position: refs/heads/master@{#302752}

[Dirk Pranke, 2014-11-05 02:33:53]

dpranke@chromium.org changed reviewers:
+ cmasone@chromium.org
- dpranke@google.com

[Chris Masone, 2014-11-05 02:42:15]

lgtm!

Let's get this on a bot so it stops regressing...

[Dirk Pranke, 2014-11-05 03:10:12]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2014-11-05 03:10:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/705623004/20001

[commit-bot: I haz the power, 2014-11-05 03:15:01]

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

[commit-bot: I haz the power, 2014-11-05 03:15:03]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Dirk Pranke, 2014-11-05 03:37:36]

tbr'ing brett for an OWNERS approval.

[Dirk Pranke, 2014-11-05 03:38:00]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2014-11-05 03:38:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/705623004/20001

[commit-bot: I haz the power, 2014-11-05 03:54:55]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-11-05 03:55:34]

Patchset 2 (id:??) landed as
https://crrev.com/acd282e852c15ea7b3dd1d09252dbe9f66578f2c
Cr-Commit-Position: refs/heads/master@{#302752}