Apply clang-format and import of https://github.com/google/tcmalloc/pull/50
Apply clang-format and import of https://github.com/google/tcmalloc/pull/50

PiperOrigin-RevId: 337894411
Change-Id: I372c99c367bd44ae6d096fc1f3219359f3395a94

google/tcmalloc,google/tcmalloc,google/tcmalloc