WebRTC internal headers are always included starting from the root
(e.g. #include "modules/audio_device/..."), so there is no need to
specify the include_dirs removed by this CL.
Bug: webrtc:9538
Change-Id: If26edecc004c6e8c3bbef3c8185c7e272110c951
Reviewed-on: https://webrtc-review.googlesource.com/89391
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24034}