GitLab

Use wtf_size_t when dealing with WTF types.

BUG=879657

Change-Id: Ic2eec59581223c897b76675a2d7b1fb47a1327da
Reviewed-on: https://chromium-review.googlesource.com/c/1257681
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596208}