Enable GN check for webrtc/{p2p,system_wrappers}
Introduce new small header-only targets in system_wrappers:
:cpu_features_api
:field_trial_api
:metrics_api
to untangle and optimize dependencies but still satisfy GN check.
In webrtc/p2p, previously uncovered header "base/fakecandidatepair.h"
is added to :p2p_test_utils target.
Refactor system_wrappers so 'rtc_p2p' can depend on only
system_wrappers:field_trial_api instead of all of system_wrappers
(which led to a breakage in Chromium that called for the revert of
https://codereview.webrtc.org/2735583002).
BUG=webrtc:6828
NOTRY=True
Review-Url: https://codereview.webrtc.org/2739863002
Cr-Original-Commit-Position: refs/heads/master@{#17812}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 8a1166321985a2a8a699e80e24d5297cdad9d7e0
4 files changed
