Revert of Adding "first packet received" notification to PeerConnectionObserver.

Revert of Adding "first packet received" notification to PeerConnectionObserver. (patchset #5 id:80001 of https://codereview.webrtc.org/1581693006/ )

Reason for revert:
onFirstMediaPacketReceived() breaks bot.

Original issue's description:
> Adding "first packet received" notification to PeerConnectionObserver.
>
> R=glaznev@webrtc.org, pthatcher@webrtc.org, tkchin@webrtc.org
>
> Committed: https://crrev.com/42265a8cc3b3f3db4aa2c29005aed2fb4393adef
> Cr-Commit-Position: refs/heads/master@{#11401}
>
> Committed: https://crrev.com/08a6eab75e13613183509d91d3892c1db57f6fc5
> Cr-Commit-Position: refs/heads/master@{#11404}

TBR=pthatcher@webrtc.org,tkchin@webrtc.org,glaznev@webrtc.org,deadbeef@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/6043f2e5d69da50c4d288e67a7eb9f9bd1eb3dc7
Cr-Commit-Position: refs/heads/master@{#11415}

[terelius, 2016-01-28 13:05:55]

Created Revert of Adding "first packet received" notification to
PeerConnectionObserver.

[commit-bot: I haz the power, 2016-01-28 13:05:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1647483004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1647483004/1

[commit-bot: I haz the power, 2016-01-28 13:06:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-28 13:06:29]

Description was changed from

==========
Revert of Adding "first packet received" notification to PeerConnectionObserver.
(patchset #5 id:80001 of https://codereview.webrtc.org/1581693006/ )

Reason for revert:
onFirstMediaPacketReceived() breaks bot.

Original issue's description:
> Adding "first packet received" notification to PeerConnectionObserver.
> 
> R=glaznev@webrtc.org, pthatcher@webrtc.org, tkchin@webrtc.org
> 
> Committed: https://crrev.com/42265a8cc3b3f3db4aa2c29005aed2fb4393adef
> Cr-Commit-Position: refs/heads/master@{#11401}
> 
> Committed: https://crrev.com/08a6eab75e13613183509d91d3892c1db57f6fc5
> Cr-Commit-Position: refs/heads/master@{#11404}

TBR=pthatcher@webrtc.org,tkchin@webrtc.org,glaznev@webrtc.org,deadbeef@webrtc...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

to

==========
Revert of Adding "first packet received" notification to PeerConnectionObserver.
(patchset #5 id:80001 of https://codereview.webrtc.org/1581693006/ )

Reason for revert:
onFirstMediaPacketReceived() breaks bot.

Original issue's description:
> Adding "first packet received" notification to PeerConnectionObserver.
>
> R=glaznev@webrtc.org, pthatcher@webrtc.org, tkchin@webrtc.org
>
> Committed: https://crrev.com/42265a8cc3b3f3db4aa2c29005aed2fb4393adef
> Cr-Commit-Position: refs/heads/master@{#11401}
>
> Committed: https://crrev.com/08a6eab75e13613183509d91d3892c1db57f6fc5
> Cr-Commit-Position: refs/heads/master@{#11404}

TBR=pthatcher@webrtc.org,tkchin@webrtc.org,glaznev@webrtc.org,deadbeef@webrtc...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/6043f2e5d69da50c4d288e67a7eb9f9bd1eb3dc7
Cr-Commit-Position: refs/heads/master@{#11415}
==========

[commit-bot: I haz the power, 2016-01-28 13:06:30]

Patchset 1 (id:??) landed as
https://crrev.com/6043f2e5d69da50c4d288e67a7eb9f9bd1eb3dc7
Cr-Commit-Position: refs/heads/master@{#11415}