media: Allow WMPI to send playing started notification while playing

media: Allow WMPI to send playing started notification while playing

Previously MediaWebContentsObserver DCHECKed that an active player
was never added twice. To avoid complicated logic in WMPI to keep track
of when it's okay to send a playing notification to
MediaWebContentsObserver, now it's allowed to send it more than once.

BUG=595903, 595970
Committed: https://crrev.com/73fd2eb18f1ed48a1047d737a9db170608ac6f47
Cr-Commit-Position: refs/heads/master@{#382098}

[watk, 2016-03-17 22:56:28]

watk@chromium.org changed reviewers:
+ dalecurtis@chromium.org

[DaleCurtis, 2016-03-17 23:11:01]

lgtm

[watk, 2016-03-18 20:34:31]

The CQ bit was checked by watk@chromium.org

[commit-bot: I haz the power, 2016-03-18 20:34:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1810213002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1810213002/1

[DaleCurtis, 2016-03-18 20:41:17]

Description was changed from

==========
media: Allow WMPI to send playing started notification while playing

Previously MediaWebContentsObserver DCHECKed that an active player
was never added twice. To avoid complicated logic in WMPI to keep track
of when it's okay to send a playing notification to
MediaWebContentsObserver, now it's allowed to send it more than once.

BUG=595903
==========

to

==========
media: Allow WMPI to send playing started notification while playing

Previously MediaWebContentsObserver DCHECKed that an active player
was never added twice. To avoid complicated logic in WMPI to keep track
of when it's okay to send a playing notification to
MediaWebContentsObserver, now it's allowed to send it more than once.

BUG=595903, 595970
==========

[commit-bot: I haz the power, 2016-03-18 21:46:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-18 21:47:57]

Description was changed from

==========
media: Allow WMPI to send playing started notification while playing

Previously MediaWebContentsObserver DCHECKed that an active player
was never added twice. To avoid complicated logic in WMPI to keep track
of when it's okay to send a playing notification to
MediaWebContentsObserver, now it's allowed to send it more than once.

BUG=595903, 595970
==========

to

==========
media: Allow WMPI to send playing started notification while playing

Previously MediaWebContentsObserver DCHECKed that an active player
was never added twice. To avoid complicated logic in WMPI to keep track
of when it's okay to send a playing notification to
MediaWebContentsObserver, now it's allowed to send it more than once.

BUG=595903, 595970

Committed: https://crrev.com/73fd2eb18f1ed48a1047d737a9db170608ac6f47
Cr-Commit-Position: refs/heads/master@{#382098}
==========

[commit-bot: I haz the power, 2016-03-18 21:47:58]

Patchset 1 (id:??) landed as
https://crrev.com/73fd2eb18f1ed48a1047d737a9db170608ac6f47
Cr-Commit-Position: refs/heads/master@{#382098}