Mark optional mojo quads fields as nullable

Mark optional mojo quads fields as nullable

These fields are intended to all be null but one, so annotate them all
as nullable in the mojom so the validator is happy.

NOTRY=true
(linux_gpu bot is down due to infra problem, passes everything else)

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=290945

[yzshen1, 2014-08-20 19:29:03]

lgtm

[jamesr, 2014-08-20 19:39:09]

The CQ bit was checked by jamesr@chromium.org

[commit-bot: I haz the power, 2014-08-20 19:40:42]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jamesr@chromium.org/489213002/1

[commit-bot: I haz the power, 2014-08-20 20:52:27]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)
  android_clang_dbg on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_clang_d...)
  android_dbg_tests_recipe on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tes...)
  win_chromium_compile_dbg on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_comp...)

[commit-bot: I haz the power, 2014-08-20 20:55:21]

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

[commit-bot: I haz the power, 2014-08-20 20:55:22]

Try jobs failed on following builders:
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)
  android_clang_dbg on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_clang_d...)

[jamesr, 2014-08-20 20:58:19]

The CQ bit was checked by jamesr@chromium.org

[commit-bot: I haz the power, 2014-08-20 21:00:23]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jamesr@chromium.org/489213002/1

[commit-bot: I haz the power, 2014-08-20 21:50:25]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)
  android_clang_dbg on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_clang_d...)

[commit-bot: I haz the power, 2014-08-20 21:54:11]

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

[commit-bot: I haz the power, 2014-08-20 21:54:12]

Try jobs failed on following builders:
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)

[jamesr, 2014-08-20 23:07:38]

The CQ bit was checked by jamesr@chromium.org

[commit-bot: I haz the power, 2014-08-20 23:10:32]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jamesr@chromium.org/489213002/1

[commit-bot: I haz the power, 2014-08-20 23:15:14]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)

[jamesr, 2014-08-20 23:15:48]

The CQ bit was unchecked by jamesr@chromium.org

[jamesr, 2014-08-20 23:15:49]

The CQ bit was checked by jamesr@chromium.org

[commit-bot: I haz the power, 2014-08-20 23:17:48]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jamesr@chromium.org/489213002/1

[commit-bot: I haz the power, 2014-08-20 23:20:04]

Committed patchset #1 (1) as 290945