Renames aura::client::WindowTreeClient to WindowParentingClient

Renames aura::client::WindowTreeClient to WindowParentingClient

This way it won't conflict with ui::WindowTreeClient, which we want to
move to aura.

BUG=none
TEST=rename only
R=ben@chromium.org

Committed: https://crrev.com/28f20d6f553d7ddc0ea1cf52f31d6e6e2ded7b3a
Cr-Commit-Position: refs/heads/master@{#426642}

[sky, 2016-10-20 20:31:26]

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

[commit-bot: I haz the power, 2016-10-20 20:32:36]

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, 2016-10-20 21:49:08]

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

[commit-bot: I haz the power, 2016-10-20 21:49:09]

Dry run: This issue passed the CQ dry run.

[Ben Goodger (Google), 2016-10-20 22:59:25]

lgtm

[sky, 2016-10-20 23:01:00]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2016-10-20 23:02:13]

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, 2016-10-20 23:22:26]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-10-21 13:24:23]

Description was changed from

==========
Renames aura::client::WindowTreeClient to WindowParentingClient

This way it won't conflict with ui::WindowTreeClient, which we want to
move to aura.

BUG=none
TEST=rename only
R=ben@chromium.org
==========

to

==========
Renames aura::client::WindowTreeClient to WindowParentingClient

This way it won't conflict with ui::WindowTreeClient, which we want to
move to aura.

BUG=none
TEST=rename only
R=ben@chromium.org

Committed: https://crrev.com/28f20d6f553d7ddc0ea1cf52f31d6e6e2ded7b3a
Cr-Commit-Position: refs/heads/master@{#426642}
==========

[commit-bot: I haz the power, 2016-10-21 13:24:24]

Patchset 2 (id:??) landed as
https://crrev.com/28f20d6f553d7ddc0ea1cf52f31d6e6e2ded7b3a
Cr-Commit-Position: refs/heads/master@{#426642}