ThreadIdentifier  327 Source/core/inspector/InspectorTimelineAgent.h     typedef HashMap<ThreadIdentifier, TimelineThreadState> ThreadStateMap;
ThreadIdentifier   39 Source/wtf/MainThread.h typedef uint32_t ThreadIdentifier;
ThreadIdentifier   44 Source/wtf/Threading.h typedef uint32_t ThreadIdentifier;
ThreadIdentifier   97 Source/wtf/ThreadingPthreads.cpp typedef HashMap<ThreadIdentifier, OwnPtr<PthreadState> > ThreadMap;