Re-enables a bunch of base unittests part II.

BUG=3836
R=marpan@google.com

Review URL: https://webrtc-codereview.appspot.com/30709004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7415 4adac7df-926f-26a2-2b94-8c16560cd09d