Manual review shows that several more sources should be excluded for the Chromium build. This is likely what's blocking https://codereview.chromium.org/2022833002/ It was also discovered that the following were missing from GYP+GN: webrtc/p2p/base/dtlstransport.h webrtc/p2p/base/session.cc webrtc/p2p/base/session.h BUG=webrtc:4256 TBR=pthatcher@webrtc.org NOTRY=True NOPRESUBMIT=True Review-Url: https://codereview.webrtc.org/2077883002 Cr-Commit-Position: refs/heads/master@{#13200}