This reverts commit 6c27d56a2aeb2cff10a216d714552f4970d99d32. Reason for revert: Breaks C++ 17 compilation (https://ci.chromium.org/ui/p/webrtc/builders/perf/Fuchsia%20Builder/157/overview). While the proposed fix doesn't seem to be trivial and causes some disagreements: https://webrtc-review.googlesource.com/c/src/+/288460 The bot will be added to CQ. Original change's description: > sdp: measure rtp header extension collisions > > since extension ids are required to be unique in a BUNDLE group: > https://www.rfc-editor.org/rfc/rfc8843#name-rtp-header-extensions-consi > > Measure how much enforcing this would break in UMA first. > > BUG=webrtc:14782 > > Change-Id: Ieaf7a436feea677032499e11ca14973eebda322e > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/288362 > Reviewed-by: Harald Alvestrand <hta@webrtc.org> > Commit-Queue: Philipp Hancke <phancke@microsoft.com> > Reviewed-by: Johannes Kron <kron@webrtc.org> > Cr-Commit-Position: refs/heads/main@{#38914} No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: I454acc80ac222395acd640dc9f8bcea941855861 Bug: webrtc:14782 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/288382 Commit-Queue: Andrey Logvin <landrey@google.com> Owners-Override: Jeremy Leconte <jleconte@google.com> Reviewed-by: Jeremy Leconte <jleconte@webrtc.org> Owners-Override: Andrey Logvin <landrey@google.com> Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com> Reviewed-by: Jeremy Leconte <jleconte@google.com> Cr-Commit-Position: refs/heads/main@{#38915}