Make x32 compile with gcc.
Make x32 compile with gcc.

BUG=chromium:430032
LOG=n

Review URL: https://codereview.chromium.org/1156183004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#28821}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh