This reverts commit 298313534df2420e079ffc6fc9c6019d01d29a88.
Changes from the original commit:
* Call OnTransportClosed() from TeardownDataChannelTransport_n()
(same as before the original commit)
* Not call OnTransportClosed() from OnTransportChanged() when its
called with nullptr (also preserving the behaviour from before
the original commit).
Original change's description:
> Revert "Add param to DCC::SetupDataChannelTransport_n, simplify DCC* setup code."
>
> This reverts commit 2ec6a6c57830e06f601607c1b9473ad821b57e07.
>
> Reason for revert: It breaks WPT tests (e.g. https://ci.chromium.org/ui/p/chromium/builders/try/linux-rel/1361972/overview) blocking the roll into Chromium.
>
> Original change's description:
> > Add param to DCC::SetupDataChannelTransport_n, simplify DCC* setup code.
> >
> > * DCC = DataChannelController.
> >
> > * Consolidate steps to set the mid and transport name. They're now
> > set at the same time and without a separate PostTask.
> > * Transport sink is now consistently set in DCC
> > * Order of notifications for setting up the transport is now the same
> > regardless of the first time the transport is being set or if it's
> > being replaced.
> > * Made set_data_channel_transport() private.
> >
> > Bug: webrtc:11547
> > Change-Id: I39e89c6e269e6f06d55981d7944678bf23c8817a
> > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/300562
> > Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
> > Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
> > Cr-Commit-Position: refs/heads/main@{#39859}
>
> Bug: webrtc:11547
> Change-Id: I0d8d7453b71be80fbf1b7eba7d161336e29de091
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/301360
> Auto-Submit: Mirko Bonadei <mbonadei@webrtc.org>
> Owners-Override: Mirko Bonadei <mbonadei@webrtc.org>
> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
> Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
> Cr-Commit-Position: refs/heads/main@{#39864}
Bug: webrtc:11547
Change-Id: I8ebbc3d3a12786dff2096350a77e03e98466ff00
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/301702
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39884}
aa3c9f2972