Switch to standard int types.
Switch to standard int types.

Definition of uint32 used here is from third_party/smhasher/src/City.h,
which is probably not desired.

BUG=

Review URL: https://codereview.chromium.org/1644963002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#372152}

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