Chromium requires that all code that waits on a sync primitive be
annotated with ScopedAllowBaseSyncPrimitives(ForTesting). Webrtc
already imports ScopedAllowBaseSyncPrimitives.
ScopedAllowBaseSyncPrimitivesForTesting is equivalent but can only
be used in tests and doesn't required adding a friend declaration to
thread_restrictions.h.
Previously, the code that is annotated with
ScopedAllowBaseSyncPrimitivesForTesting in this CL didn't fail because
it ran on a TaskRunner annotated with the deprecated
WithBaseSyncPrimitives() trait (cf.
https://cs.chromium.org/chromium/src/content/renderer/media/webrtc/task_queue_factory_unittest.cc?l=23&rcl=362f3723ac358d932ea2e3af65512a1243697a31).
Change-Id: Id7cfa2ea108870de86dc887458ae783c807791cc
Bug: chromium:889029
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128823
Commit-Queue: Francois Pierre Doray <fdoray@chromium.org>
Reviewed-by: Tommi <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27339}
8ea977d2fd