Revert of Fix race / crash in OnNetworkRouteChanged().

Revert of Fix race / crash in OnNetworkRouteChanged(). (patchset #5 id:80001 of https://codereview.webrtc.org/2366333003/ )

Reason for revert:
Caused issues with webrtc_perf_tests on build bots.

Original issue's description:
> Fix race / crash in OnNetworkRouteChanged().
>
> To achieve this some refactoring was done to make it possible to synchronize
> access to the DelayBasedBwe in TransportFeedbackAdapter:
> - The callback was removed from DelayBasedBwe, it now instead returns its
>   result.
> - TransportFeedbackAdapter was moved to modules/congestion_controller to avoid
>   unnecessary dependencies.
>
> Reenables previously disabled flaky test. Can no longer reproduce flakiness with gtest-parallel and asan/tsan builds.
>
> BUG=webrtc:6427, webrtc:6422
>
> Committed: https://crrev.com/fd0d42669204e6dd92a60736bca7ae0196663024
> Cr-Commit-Position: refs/heads/master@{#14430}

TBR=terelius@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6427, webrtc:6422
Committed: https://crrev.com/5ec85fbcb7ef7ba0684ae2b69df7f36f118bb31f
Cr-Commit-Position: refs/heads/master@{#14433}

[stefan-webrtc, 2016-09-29 11:19:25]

The CQ bit was checked by stefan@webrtc.org

[stefan-webrtc, 2016-09-29 11:19:25]

Created Revert of Fix race / crash in OnNetworkRouteChanged().

[commit-bot: I haz the power, 2016-09-29 11:19:28]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2016-09-29 11:19:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-29 11:19:48]

Description was changed from

==========
Revert of Fix race / crash in OnNetworkRouteChanged(). (patchset #5 id:80001 of
https://codereview.webrtc.org/2366333003/ )

Reason for revert:
Caused issues with webrtc_perf_tests on build bots.

Original issue's description:
> Fix race / crash in OnNetworkRouteChanged().
> 
> To achieve this some refactoring was done to make it possible to synchronize
> access to the DelayBasedBwe in TransportFeedbackAdapter:
> - The callback was removed from DelayBasedBwe, it now instead returns its
>   result.
> - TransportFeedbackAdapter was moved to modules/congestion_controller to avoid
>   unnecessary dependencies.
> 
> Reenables previously disabled flaky test. Can no longer reproduce flakiness
with gtest-parallel and asan/tsan builds.
> 
> BUG=webrtc:6427, webrtc:6422
> 
> Committed: https://crrev.com/fd0d42669204e6dd92a60736bca7ae0196663024
> Cr-Commit-Position: refs/heads/master@{#14430}

TBR=terelius@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6427, webrtc:6422
==========

to

==========
Revert of Fix race / crash in OnNetworkRouteChanged(). (patchset #5 id:80001 of
https://codereview.webrtc.org/2366333003/ )

Reason for revert:
Caused issues with webrtc_perf_tests on build bots.

Original issue's description:
> Fix race / crash in OnNetworkRouteChanged().
>
> To achieve this some refactoring was done to make it possible to synchronize
> access to the DelayBasedBwe in TransportFeedbackAdapter:
> - The callback was removed from DelayBasedBwe, it now instead returns its
>   result.
> - TransportFeedbackAdapter was moved to modules/congestion_controller to avoid
>   unnecessary dependencies.
>
> Reenables previously disabled flaky test. Can no longer reproduce flakiness
with gtest-parallel and asan/tsan builds.
>
> BUG=webrtc:6427, webrtc:6422
>
> Committed: https://crrev.com/fd0d42669204e6dd92a60736bca7ae0196663024
> Cr-Commit-Position: refs/heads/master@{#14430}

TBR=terelius@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6427, webrtc:6422

Committed: https://crrev.com/5ec85fbcb7ef7ba0684ae2b69df7f36f118bb31f
Cr-Commit-Position: refs/heads/master@{#14433}
==========

[commit-bot: I haz the power, 2016-09-29 11:19:49]

Patchset 1 (id:??) landed as
https://crrev.com/5ec85fbcb7ef7ba0684ae2b69df7f36f118bb31f
Cr-Commit-Position: refs/heads/master@{#14433}