commit 83d3ec177ce1c4860e2b48088aa02d1ab508770b
author Karl Wiberg <kwiberg@webrtc.org> Thu Sep 28 17:54:38 2017
committer Commit Bot <commit-bot@chromium.org> Thu Sep 28 18:32:37 2017
tree 354b67ce39f89768c02a107677a957948234b914
parent 27bafec7c1ff0fc87d8826436e5364e31622a27c

Convert PayloadUnion from a union to a class, step 1

I need to replace the audio part of PayloadUnion with SdpAudioFormat,
but that's a non-trivially-deletable class and those just don't work
well in unions, especially unions that don't have a discriminator that
says which member is currently active.

This CL converts the union to a class, adds a discriminator, and
provides accessor functions. CL #2 in the series will change all
outsiders to use the accessors instead of the public member variables
directly, and CL #3 will remove the public member variables. (It needs
to be done in separate steps like this because PayloadUnion is
unfortunately part of the API, and just changing it all in one go
would break users.)

BUG=webrtc:8159

Change-Id: I38c44bbb21a2d38600cff59bf37d8d47dfdbce21
Reviewed-on: https://webrtc-review.googlesource.com/4340
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20025}