Remove fakewebrtccommon.h.

BUG=webrtc:4690

Review-Url: https://codereview.webrtc.org/1583773006
Cr-Original-Commit-Position: refs/heads/master@{#13993}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: f7a5335ca5f154100a479d2feeef1c465e159bd0
4 files changed