Converts RootWindowLayoutManager to common types

Converts RootWindowLayoutManager to common types

RootWindowLayoutManager was calling into the background, I changed
the background to listen for bounds changes on the parent, which makes
more sense.

BUG=none
TEST=none

Committed: https://crrev.com/7cd30704baf1b5f83f8514f46da9759e36349195
Cr-Commit-Position: refs/heads/master@{#397242}

[sky, 2016-06-01 18:24:24]

Description was changed from

==========
Converts RootWindowLayoutManager to common types

RootWindowLayoutManager was calling into the background, I changed
the background to listen for bounds changes on the parent, which makes
more sense.

BUG=none
TEST=none
==========

to

==========
Converts RootWindowLayoutManager to common types

RootWindowLayoutManager was calling into the background, I changed
the background to listen for bounds changes on the parent, which makes
more sense.

BUG=none
TEST=none
==========

[sky, 2016-06-01 18:24:24]

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

[James Cook, 2016-06-01 20:50:30]

lgtm

[sky, 2016-06-01 20:51:52]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2016-06-01 20:52:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2032613002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/2032613002/1

[commit-bot: I haz the power, 2016-06-01 21:11:03]

Description was changed from

==========
Converts RootWindowLayoutManager to common types

RootWindowLayoutManager was calling into the background, I changed
the background to listen for bounds changes on the parent, which makes
more sense.

BUG=none
TEST=none
==========

to

==========
Converts RootWindowLayoutManager to common types

RootWindowLayoutManager was calling into the background, I changed
the background to listen for bounds changes on the parent, which makes
more sense.

BUG=none
TEST=none
==========

[commit-bot: I haz the power, 2016-06-01 21:11:04]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-01 21:15:18]

Description was changed from

==========
Converts RootWindowLayoutManager to common types

RootWindowLayoutManager was calling into the background, I changed
the background to listen for bounds changes on the parent, which makes
more sense.

BUG=none
TEST=none
==========

to

==========
Converts RootWindowLayoutManager to common types

RootWindowLayoutManager was calling into the background, I changed
the background to listen for bounds changes on the parent, which makes
more sense.

BUG=none
TEST=none

Committed: https://crrev.com/7cd30704baf1b5f83f8514f46da9759e36349195
Cr-Commit-Position: refs/heads/master@{#397242}
==========

[commit-bot: I haz the power, 2016-06-01 21:15:19]

Patchset 1 (id:??) landed as
https://crrev.com/7cd30704baf1b5f83f8514f46da9759e36349195
Cr-Commit-Position: refs/heads/master@{#397242}