Historically this directory has been a home for Valgrind and ThreadSanitizer.
Since then other memory tools used in Chromium started squatting here and the
name became confusing.
We're replacing tools/valgrind with tools/memory/ new tools should go there.
Attention: ThreadSanitizer v1 has been retired and files in this dir
should not be used anymore. Please refer to
http://dev.chromium.org/developers/testing/threadsanitizer-tsan-v2
for the instructions on using ThreadSanitizer v2.
Namely, the suppressions now reside in base/debug/tsan_suppressions.cc
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