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

Revert of Adding "first packet received" notification to PeerConnectionObserver. (patchset #4 id:60001 of https://codereview.webrtc.org/1581693006/ )

Reason for revert:
Seems that the end-to-end unit tests are now flaky: https://build.chromium.org/p/client.webrtc/builders/Win64%20Debug/builds/6283

Will reland after fixing the test flakiness.

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}

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

Committed: https://crrev.com/7b3c72ffa9f4122192e9bb0d67b7794b28182511
Cr-Commit-Position: refs/heads/master@{#11402}

[Taylor Brandstetter, 2016-01-27 21:03:23]

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

[commit-bot: I haz the power, 2016-01-27 21:03:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1640173004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1640173004/1

[commit-bot: I haz the power, 2016-01-27 21:03:45]

Description was changed from

==========
Revert of Adding "first packet received" notification to PeerConnectionObserver.
(patchset #4 id:60001 of https://codereview.webrtc.org/1581693006/ )

Reason for revert:
Seems that the end-to-end unit tests are now flaky:
https://build.chromium.org/p/client.webrtc/builders/Win64%20Debug/builds/6283

Will reland after fixing the test flakiness.

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}

TBR=pthatcher@webrtc.org,tkchin@webrtc.org,glaznev@webrtc.org
# 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 #4 id:60001 of https://codereview.webrtc.org/1581693006/ )

Reason for revert:
Seems that the end-to-end unit tests are now flaky:
https://build.chromium.org/p/client.webrtc/builders/Win64%20Debug/builds/6283

Will reland after fixing the test flakiness.

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}

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

[commit-bot: I haz the power, 2016-01-27 21:03:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-27 21:03:54]

Description was changed from

==========
Revert of Adding "first packet received" notification to PeerConnectionObserver.
(patchset #4 id:60001 of https://codereview.webrtc.org/1581693006/ )

Reason for revert:
Seems that the end-to-end unit tests are now flaky:
https://build.chromium.org/p/client.webrtc/builders/Win64%20Debug/builds/6283

Will reland after fixing the test flakiness.

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}

TBR=pthatcher@webrtc.org,tkchin@webrtc.org,glaznev@webrtc.org
# 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 #4 id:60001 of https://codereview.webrtc.org/1581693006/ )

Reason for revert:
Seems that the end-to-end unit tests are now flaky:
https://build.chromium.org/p/client.webrtc/builders/Win64%20Debug/builds/6283

Will reland after fixing the test flakiness.

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}

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

Committed: https://crrev.com/7b3c72ffa9f4122192e9bb0d67b7794b28182511
Cr-Commit-Position: refs/heads/master@{#11402}
==========

[commit-bot: I haz the power, 2016-01-27 21:03:54]

Patchset 1 (id:??) landed as
https://crrev.com/7b3c72ffa9f4122192e9bb0d67b7794b28182511
Cr-Commit-Position: refs/heads/master@{#11402}