Moves DragDropClient to aura/client

Moves DragDropClient to aura/client

I'm going to need this in aura/client for mus.

BUG=659155
TEST=covered by tests
R=ben@chromium.org

Committed: https://crrev.com/92d41b244faecf619cbff52ca3f08e4a25afb14e
Cr-Commit-Position: refs/heads/master@{#428121}

[sky, 2016-10-27 17:58:20]

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

[commit-bot: I haz the power, 2016-10-27 17:58:54]

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

[Ben Goodger (Google), 2016-10-27 18:24:42]

lgtm

[commit-bot: I haz the power, 2016-10-27 20:01:04]

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

[commit-bot: I haz the power, 2016-10-27 20:01:05]

Dry run: This issue passed the CQ dry run.

[sky, 2016-10-27 20:02:54]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2016-10-27 20:04:06]

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, 2016-10-27 20:10:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-27 20:12:07]

Description was changed from

==========
Moves DragDropClient to aura/client

I'm going to need this in aura/client for mus.

BUG=659155
TEST=covered by tests
R=ben@chromium.org
==========

to

==========
Moves DragDropClient to aura/client

I'm going to need this in aura/client for mus.

BUG=659155
TEST=covered by tests
R=ben@chromium.org

Committed: https://crrev.com/92d41b244faecf619cbff52ca3f08e4a25afb14e
Cr-Commit-Position: refs/heads/master@{#428121}
==========

[commit-bot: I haz the power, 2016-10-27 20:12:08]

Patchset 1 (id:??) landed as
https://crrev.com/92d41b244faecf619cbff52ca3f08e4a25afb14e
Cr-Commit-Position: refs/heads/master@{#428121}