mash: Convert ash::ShellDelegate from aura::Window to WmWindow

mash: Convert ash::ShellDelegate from aura::Window to WmWindow

Also remove unnecessary shell.h include from shell_delegate.h and clean up
includes elsewhere.

BUG=615155
TEST=existing ash_unittests and chrome unit_tests

Committed: https://crrev.com/fd4ba1d215ee2450d23ac71a1d3728d4bb21de18
Cr-Commit-Position: refs/heads/master@{#399097}

[James Cook, 2016-06-09 22:52:31]

jamescook@chromium.org changed reviewers:
+ sky@chromium.org

[James Cook, 2016-06-09 22:52:32]

sky, please take a look.

Now that I look at it more I think I need to either wait until more of the
delegates are ported to //ash/common or introduce a wm_shell_delegate.h and
migrate things gradually.

Otherwise I end up creating a ShellDelegateMus that vends null delegates, which
seems risky.

[sky, 2016-06-09 23:07:32]

LGTM

[James Cook, 2016-06-09 23:40:51]

The CQ bit was checked by jamescook@chromium.org

[commit-bot: I haz the power, 2016-06-09 23:41:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2055053002/20001

[commit-bot: I haz the power, 2016-06-10 00:51:42]

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

[commit-bot: I haz the power, 2016-06-10 00:51:42]

Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build
URL)
  mac_chromium_gn_rel on tryserver.chromium.mac (JOB_TIMED_OUT, no build URL)
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build URL)

[James Cook, 2016-06-10 04:16:44]

The CQ bit was checked by jamescook@chromium.org

[commit-bot: I haz the power, 2016-06-10 04:17:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2055053002/20001

[commit-bot: I haz the power, 2016-06-10 04:38:31]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-06-10 04:41:11]

Description was changed from

==========
mash: Convert ash::ShellDelegate from aura::Window to WmWindow

Also remove unnecessary shell.h include from shell_delegate.h and clean up
includes elsewhere.

BUG=615155
TEST=existing ash_unittests and chrome unit_tests
==========

to

==========
mash: Convert ash::ShellDelegate from aura::Window to WmWindow

Also remove unnecessary shell.h include from shell_delegate.h and clean up
includes elsewhere.

BUG=615155
TEST=existing ash_unittests and chrome unit_tests

Committed: https://crrev.com/fd4ba1d215ee2450d23ac71a1d3728d4bb21de18
Cr-Commit-Position: refs/heads/master@{#399097}
==========

[commit-bot: I haz the power, 2016-06-10 04:41:13]

Patchset 2 (id:??) landed as
https://crrev.com/fd4ba1d215ee2450d23ac71a1d3728d4bb21de18
Cr-Commit-Position: refs/heads/master@{#399097}