See some relevant context on this project in https://github.com/abseil/abseil-cpp/commit/254b3a5326932026fd23923fd367619d2837f0ad. This type existed to support the incremental migration of added validation to MockingBitGen, validating that the returned value from absl::Uniform() is in bounds. All known cases where an out-of-bounds value was returned have been fixed and migrated to use MockingBitGen.

PiperOrigin-RevId: 693836317
Change-Id: I04f54b7b4856f4280580b294194ce2c25a18e9b1