Skia and Firefox - Integer Overflow in SkTDArray Leading to Out-of-Bounds Write

!-- Skia bug report: https://bugs.chromium.org/p/skia/issues/detail?id=7674 Mozilla bug report: https://bugzilla.mozilla.org/showbug.cgi?id=1441941 In Skia, SkTDArray stores length fCount and capacity fReserve as 32-bit ints and does not perform any integer overflow checks. There are a couple of...