media: Cancel any pending pipeline restart when the player is hidden

media: Cancel any pending pipeline restart when the player is hidden

It's possible for WMPI to get an OnHidden callback while in the middle
of a suspend/resume restart. Previously it would continue with the
restart, incorrectly resuming after being hidden. Now it will cancel
any ongoing restart when receiving OnHidden.

BUG=597404
Review URL: https://codereview.chromium.org/1827873003

Cr-Commit-Position: refs/heads/master@{#382964}
(cherry picked from commit 01dc013d3ae6e6e1b5a0e34733652b2febabe488)

Committed: https://chromium.googlesource.com/chromium/src/+/9a86871643138320e2066ee572bc4acba25c55d1

[watk, 2016-03-24 21:47:04]

Description was changed from

==========
media: Cancel any pending pipeline restart when the player is hidden

It's possible for WMPI to get an OnHidden callback while in the middle
of a suspend/resume restart. Previously it would continue with the
restart, incorrectly resuming after being hidden. Now it will cancel
any ongoing restart when receiving OnHidden.

BUG=597404

Review URL: https://codereview.chromium.org/1827873003

Cr-Commit-Position: refs/heads/master@{#382964}
(cherry picked from commit 01dc013d3ae6e6e1b5a0e34733652b2febabe488)
==========

to

==========
media: Cancel any pending pipeline restart when the player is hidden

It's possible for WMPI to get an OnHidden callback while in the middle
of a suspend/resume restart. Previously it would continue with the
restart, incorrectly resuming after being hidden. Now it will cancel
any ongoing restart when receiving OnHidden.

BUG=597404

Review URL: https://codereview.chromium.org/1827873003

Cr-Commit-Position: refs/heads/master@{#382964}
(cherry picked from commit 01dc013d3ae6e6e1b5a0e34733652b2febabe488)

Committed:
https://chromium.googlesource.com/chromium/src/+/9a86871643138320e2066ee572bc...
==========

[watk, 2016-03-24 21:47:05]

Committed patchset #1 (id:1) manually as
9a86871643138320e2066ee572bc4acba25c55d1.