Restore aura support from Mojo repo.

Restore aura support from Mojo repo.

This is mostly a straight restore into mandoline/ui/aura (combined the needed views files in there) but had to bring a few things up to date with the state of Mojo SDK now, e.g. declienting etc.

R=sky@chromium.org
BUG=

Committed: https://crrev.com/790a612290f8c0c4245f7cfd1a4701ccf259b59b
Cr-Commit-Position: refs/heads/master@{#328290}

[sky, 2015-05-04 22:55:37]

Rubber stamp LGTM

[Ben Goodger (Google), 2015-05-04 23:52:44]

The CQ bit was checked by ben@chromium.org

[Ben Goodger (Google), 2015-05-04 23:52:44]

The patchset sent to the CQ was uploaded after l-g-t-m from sky@chromium.org
Link to the patchset: https://codereview.chromium.org/1123643007/#ps40001
(title: ".")

[commit-bot: I haz the power, 2015-05-04 23:53:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1123643007/40001

[commit-bot: I haz the power, 2015-05-05 00:08:28]

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

[commit-bot: I haz the power, 2015-05-05 00:08:30]

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

[Ben Goodger (Google), 2015-05-05 06:12:39]

The CQ bit was checked by ben@chromium.org

[Ben Goodger (Google), 2015-05-05 06:12:39]

The patchset sent to the CQ was uploaded after l-g-t-m from sky@chromium.org
Link to the patchset: https://codereview.chromium.org/1123643007/#ps60001
(title: ".")

[commit-bot: I haz the power, 2015-05-05 06:13:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1123643007/60001

[commit-bot: I haz the power, 2015-05-05 06:43:03]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2015-05-05 06:43:52]

Patchset 4 (id:??) landed as
https://crrev.com/790a612290f8c0c4245f7cfd1a4701ccf259b59b
Cr-Commit-Position: refs/heads/master@{#328290}