Chromium build fix: Include new .cc files in rtc_base

r8656 added a couple of new .cc files to rtc_base. Two of them turned
out to mistakenly be in the set excluded from the Chromium build.

TBR=kjellander@webrtc.org, tommi@webrtc.org
BUG=163

Review URL: https://webrtc-codereview.appspot.com/44589004

Cr-Commit-Position: refs/heads/master@{#8659}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8659 4adac7df-926f-26a2-2b94-8c16560cd09d
2 files changed