Moves EventDispatcher from Display to WindowManagerState

Moves EventDispatcher from Display to WindowManagerState

EventDispatcher maintains state that is per WindowManager
(accelerators, root...), so it makes sense that the EventDispatcher is
owned by the WindowManagerState.

This patch also makes Display update WindowManagerState and
EventDispatcher appropriately when the active user changes. When the
active user changes capture and any other event related state is reset.

BUG=590955
TEST=covered by tests
R=ben@chromium.org

Committed: https://crrev.com/28fd0ec2412b6662697ba5f023b0f24b9f448ad8
Cr-Commit-Position: refs/heads/master@{#380005}

[Ben Goodger (Google), 2016-03-09 00:50:40]

lgtm

[sky, 2016-03-09 00:52:46]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2016-03-09 00:53:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1775133003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1775133003/20001

[commit-bot: I haz the power, 2016-03-09 01:03:14]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-03-09 01:04:13]

Description was changed from

==========
Moves EventDispatcher from Display to WindowManagerState

EventDispatcher maintains state that is per WindowManager
(accelerators, root...), so it makes sense that the EventDispatcher is
owned by the WindowManagerState.

This patch also makes Display update WindowManagerState and
EventDispatcher appropriately when the active user changes. When the
active user changes capture and any other event related state is reset.

BUG=590955
TEST=covered by tests
R=ben@chromium.org
==========

to

==========
Moves EventDispatcher from Display to WindowManagerState

EventDispatcher maintains state that is per WindowManager
(accelerators, root...), so it makes sense that the EventDispatcher is
owned by the WindowManagerState.

This patch also makes Display update WindowManagerState and
EventDispatcher appropriately when the active user changes. When the
active user changes capture and any other event related state is reset.

BUG=590955
TEST=covered by tests
R=ben@chromium.org

Committed: https://crrev.com/28fd0ec2412b6662697ba5f023b0f24b9f448ad8
Cr-Commit-Position: refs/heads/master@{#380005}
==========

[commit-bot: I haz the power, 2016-03-09 01:04:14]

Patchset 2 (id:??) landed as
https://crrev.com/28fd0ec2412b6662697ba5f023b0f24b9f448ad8
Cr-Commit-Position: refs/heads/master@{#380005}