chromeos: Move files in //ash/common to //ash, part 2

chromeos: Move files in //ash/common to //ash, part 2

Now that mustash can use standard aura windows we don't need the ash/aura
vs. ash/mus vs. ash/common distinction. Eliminate //ash/common. Also move
files in //ash/common/system/chromeos out to //ash/system because ash only
compiles on chromeos these days.

Part 2 moves the rest of //ash/common into //ash. The CQ cannot handle
moving all files at once, see https://codereview.chromium.org/2734653002/

BUG=690096
TEST=compiles, ash_unittests
TBR=oshima@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

[James Cook, 2017-03-05 01:25:34]

Description was changed from

==========
chromeos: Move files in //ash/common to //ash, part 2

Now that mustash can use standard aura windows we don't need the ash/aura
vs. ash/mus vs. ash/common distinction. Eliminate //ash/common. Also move
files in //ash/common/system/chromeos out to //ash/system because ash only
compiles on chromeos these days.

Part 2 moves the rest of //ash/common into //ash. The CQ cannot handle
moving all files at once, see https://codereview.chromium.org/2734653002/

BUG=690096
TEST=compiles, ash_unittests
TBR=oshima@chromium.org
==========

to

==========
chromeos: Move files in //ash/common to //ash, part 2

Now that mustash can use standard aura windows we don't need the ash/aura
vs. ash/mus vs. ash/common distinction. Eliminate //ash/common. Also move
files in //ash/common/system/chromeos out to //ash/system because ash only
compiles on chromeos these days.

Part 2 moves the rest of //ash/common into //ash. The CQ cannot handle
moving all files at once, see https://codereview.chromium.org/2734653002/

BUG=690096
TEST=compiles, ash_unittests
TBR=oshima@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
==========

[James Cook, 2017-03-05 01:25:59]

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

[commit-bot: I haz the power, 2017-03-05 01:26:15]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-05 02:35:18]

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

[commit-bot: I haz the power, 2017-03-05 02:35:22]

Dry run: This issue passed the CQ dry run.