This reverts commit ccc87ea3c625e43ab138e00ba2ef1a2d99756199. Reason for revert: Breaks downstream project Original change's description: > [Stats] Remove enum-like structs in favor of strings. > > Due to a limitation of RTCStatsMember<T> not supporting enums, as well > as the fact that in JavaScript enums are represented as basic strings, > the stats enums have always been represented by T=std::string. > > Now that we have WebIDL-ified[1] all RTCStats dictionaries and enum > values are simply string-copied (example: [2]) it seems safe to assume > that "stats enums are just strings" is here to stay. > > Therefore there is little value in having C++ structs that look like > enums so I'm deleting those in favor of std::string operator==() > comparisons, e.g. `if (rtp_stream.kind == "audio")`. This removes some > lines of code from our code base. > > I mostly want to get rid of these because they were taking up about 20% > of the rtcstats_objects.h real estate... > > [1] https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/modules/peerconnection/rtc_stats_report.idl > [2] https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/modules/peerconnection/rtc_stats_report.cc;l=667;drc=cf34e84c9df94256abfb1716ba075ed203975755 > > Bug: webrtc:15245 > Change-Id: Iaf0827d7aecebc1cc02976a61663d5298d684f07 > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/308680 > Commit-Queue: Henrik Boström <hbos@webrtc.org> > Reviewed-by: Harald Alvestrand <hta@webrtc.org> > Cr-Commit-Position: refs/heads/main@{#40295} Bug: webrtc:15245 Change-Id: I05db80ba9f29460239de82cea9d95136e4c708e4 No-Presubmit: true No-Tree-Checks: true No-Try: true Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/308860 Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com> Commit-Queue: Christoffer Jansson <jansson@webrtc.org> Owners-Override: Christoffer Jansson <jansson@webrtc.org> Cr-Commit-Position: refs/heads/main@{#40298}