commit 49c0880afac8c9894159577903f0a95973ffef36
author Henrik Boström <hbos@webrtc.org> Fri Oct 25 09:54:38 2019
committer Commit Bot <commit-bot@chromium.org> Fri Oct 25 09:54:50 2019
tree 1bf25d8c4375fa720f503939b939031cd546f917
parent 1dac707ecbeb96d38de96e464bf457f74c84f542

Revert "[PeerConnection] Use an OperationsChain in PeerConnection for async ops."

This reverts commit 1dddaa1a84330091ca083c950ef2e24a85a48fc8.

Reason for revert: Breaks downstream projects :(

Original change's description:
> [PeerConnection] Use an OperationsChain in PeerConnection for async ops.
> 
> For background, motivation, requirements and implementation notes, see
> https://docs.google.com/document/d/1XLwNN2kUIGGTwz9LQ0NwJNkcybi9oKnynUEZB1jGA14/edit?usp=sharing
> 
> Using the OperationsChain will unblock future CLs from chaining multiple
> operations together such as implementing parameterless
> setLocalDescription().
> 
> In this CL, the OperationsChain is used in existing signaling operations
> with little intended side-effects. An operation that is chained onto an
> empty OperationsChain will for instance execute immediately, and
> SetLocalDescription() and SetRemoteDescription() are implemented as
> "synchronous operations".
> 
> The lifetime of the PeerConnection is not indended to change as a result
> of this CL: All chained operations use a raw pointer to the PC that is
> ensured not to be used-after-free using an "IsAlive" object.
> 
> There is one notable change though: CreateOffer() and CreateAnswer() will
> asynchronously delay other signaling methods from executing until they
> have completed.
> 
> Drive-by fix: This CL also ensures that early failing
> CreateOffer/CreateAnswer operation's observers are invoked if the
> PeerConnection is destroyed while a PostCreateSessionDescriptionFailure
> is pending.
> 
> Bug: webrtc:11019
> Change-Id: I521333e41d20d9bbfb1e721609f2c9db2a5f93a9
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/157305
> Reviewed-by: Steve Anton <steveanton@webrtc.org>
> Commit-Queue: Henrik Boström <hbos@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#29605}

TBR=steveanton@webrtc.org,hbos@webrtc.org

Change-Id: Ie540dcc8ecdc48ad0c65d23645fbc3ad5f99592b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:11019
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158405
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29611}