Remove //build/module_args/mojo.gni.

Remove //build/module_args/mojo.gni.

Now that we're no longer rolling Mojo into Chromium, we
can simplify all of the mojo and mojo-using build files
to just use the settings that are appropriate for Chromium.

The first step in this is to remove the module_args file
and merge //third_party/mojo/src/mojo/public.gni into
//mojo/public/mojo.gni.

A follow-on CL will actually remove the use of the variables
that are still defined in //mojo/public/mojo.gni and get
rid of that file too.

R=rockot@chromium.org, jam@chromium.org
BUG=

Committed: https://crrev.com/36013a053149bf7196c1a5b9e0682945c7a56a5a
Cr-Commit-Position: refs/heads/master@{#353618}

[Dirk Pranke, 2015-10-09 23:30:25]

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

[commit-bot: I haz the power, 2015-10-09 23:30:55]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1390063006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1390063006/1

[commit-bot: I haz the power, 2015-10-09 23:39:18]

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

[commit-bot: I haz the power, 2015-10-09 23:39:19]

Dry run: Try jobs failed on following builders:
  ios_dbg_simulator_ninja on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)
  ios_rel_device_ninja on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ni...)
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)
  mac_chromium_gn_rel on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_gn_r...)
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)
  win8_chromium_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_ng/...)
  win_chromium_compile_dbg_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_comp...)
  win_chromium_x64_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[Ken Rockot(use gerrit already), 2015-10-12 17:38:00]

lgtm

[Dirk Pranke, 2015-10-12 19:49:17]

The CQ bit was checked by dpranke@chromium.org

[Dirk Pranke, 2015-10-12 19:49:18]

The patchset sent to the CQ was uploaded after l-g-t-m from rockot@chromium.org
Link to the patchset: https://codereview.chromium.org/1390063006/#ps20001
(title: "merge to head")

[commit-bot: I haz the power, 2015-10-12 19:50:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1390063006/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1390063006/20001

[commit-bot: I haz the power, 2015-10-12 19:59:04]

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

[commit-bot: I haz the power, 2015-10-12 19:59:05]

Try jobs failed on following builders:
  android_chromium_gn_compile_rel on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)

[Dirk Pranke, 2015-10-12 22:08:30]

The CQ bit was checked by dpranke@chromium.org

[Dirk Pranke, 2015-10-12 22:08:30]

The patchset sent to the CQ was uploaded after l-g-t-m from rockot@chromium.org
Link to the patchset: https://codereview.chromium.org/1390063006/#ps40001
(title: "fix a few relative imports")

[commit-bot: I haz the power, 2015-10-12 22:11:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1390063006/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1390063006/40001

[commit-bot: I haz the power, 2015-10-12 22:24:07]

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

[commit-bot: I haz the power, 2015-10-12 22:24:07]

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

[jam, 2015-10-12 22:35:34]

lgtm

[Dirk Pranke, 2015-10-12 22:40:31]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2015-10-12 22:41:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1390063006/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1390063006/40001

[commit-bot: I haz the power, 2015-10-12 22:58:22]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-10-12 22:59:04]

Patchset 3 (id:??) landed as
https://crrev.com/36013a053149bf7196c1a5b9e0682945c7a56a5a
Cr-Commit-Position: refs/heads/master@{#353618}