commit db50b0355311703b4ba13a866883e7f0e5717ee5
author Evan Shrubsole <eshr@google.com> Wed Apr 24 13:27:00 2024
committer WebRTC LUCI CQ <webrtc-scoped@luci-project-accounts.iam.gserviceaccount.com> Wed Apr 24 20:53:23 2024
tree 2afe86a9c9f06473fffeb65ab53c50fee26a2375
parent 2a66531b286b44b61f22ab79251565c89f320895

Add perfetto build config

This adds Perfetto support to WebRTC with a GN flag rtc_use_perfetto.
The configuration of perfetto depends on whether or not webrtc is
build within Chrome or not. When in Chrome, WebRTC will depend on
//third_party/perfetto:libperfetto. When building standalone, specific includes required for Perfetto are exposed with the library webrtc_libperfetto.

The perfetto trace API is exposed with a header export in
trace_event.h which is used instead of the legacy API.

The addition of Perfetto means there are 4 compilation modes for
tracing in WebRTC,
1. No tracing implementation.
2. Legacy tracing (AddTraceEvent/GetCategoryEnabled).
3.a. Perfetto statically linked (webrtc_libperfetto).
3.b. Perfetto in Chrome (Chrome's libperfetto).

This CL removes the tracing expectations from
rtc_stats_integrationtest.cc because those directly used the old API.

Integration into Chrome is a follow up CL which depends on
https://chromium-review.googlesource.com/c/chromium/src/+/5471691.

Tested: Ran Chrome with Perfetto and traces appear. WebRTC Unit test tracing working: https://ui.perfetto.dev/#!?s=04ea2613ea36b814394639a1ec4b60be5b5097527f1a485995ecc13469885468
Bug: webrtc:15917
Change-Id: I537d79dc247c2b759689910c621087286a4d8fdc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/347880
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Auto-Submit: Evan Shrubsole <eshr@google.com>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Mikhail Khokhlov <khokhlov@google.com>
Cr-Commit-Position: refs/heads/main@{#42166}