Eliminates a few dependencies on the top-level common_types.h. Bug: webrtc:7660 Change-Id: I91218a27e745e7e5e6b64dff9e09f6a6ab32d644 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/181480 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31920}