Add ThreadSanitizer suppression for a debug-only data race in Thread Unfortunately, we can't make it more narrow since the stacktrace in the report looks like:   #0  base::Thread::ThreadMain()   #1  ThreadFunc(void*)   #2  ThreadSanitizerStartThread Review URL: http://codereview.chromium.org/251028
Add ThreadSanitizer suppression for a debug-only data race in Thread
Unfortunately, we can't make it more narrow since the stacktrace in the report looks like:
  #0  base::Thread::ThreadMain()
  #1  ThreadFunc(void*)
  #2  ThreadSanitizerStartThread
Review URL: http://codereview.chromium.org/251028

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@27505 0039d316-1c4b-4281-b951-d872f2087c98

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