to be compatible with projects that has own base/thread_annotation.h
NOTRY=TRUE
Review-Url: https://codereview.webrtc.org/2055473002
Cr-Commit-Position: refs/heads/master@{#13090}
ACCESS_ON is an alias of GUARDED_BY but should take thread-like object instead of mutex,
RUN_ON is an alias of EXCLUSIVE_LOCKS_REQUIRED to annotate function always run on same
thread/task_queue
RTC_DCHECK_RUN_ON - creates an object that allows use of annotated variables and functions, and adds a run-time DCHECK given thread/queue is current.
R=tommi@webrtc.org
Review-Url: https://codereview.webrtc.org/1981893002
Cr-Commit-Position: refs/heads/master@{#12812}
