Remove atomicops.h from WebRTC

atomicops.h are not necessary in trace_event.h similar to the port in WebKit.
It will cause a benign race condition detected by TSAN. If it shows up in
TSAN we will either suppress it or annotate it with dynamic annotations.

BUG=1215
Review URL: https://webrtc-codereview.appspot.com/982004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@3267 4adac7df-926f-26a2-2b94-8c16560cd09d
11 files changed