Alastair Donaldson 0118b964f3 Fix generation of random indices in regex fuzzer
Random indices were being generated in a manner that assumed the upper
bound to a Random::GetUInt call was inclusive. Also, GetUInt64 was
being used needlessly when GetUInt32 would suffice. This change
addresses both issues.

Fixes https://crbug.com/1250904

Change-Id: I9ad8e5beb3b52bcb867aeb745dec520c251cba60
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/64744
Auto-Submit: Alastair Donaldson <afdx@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Alastair Donaldson <afdx@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
2021-09-21 16:16:58 +00:00
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