GitLab

Get us a little closer to removing StringTokenizer's dependency on
std::string iterators.

Bug: 820198
Change-Id: I4bf8c0ed9b518c9a5bcd576ff3c5edaf751e82a3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1576105
Commit-Queue: David Benjamin <davidben@chromium.org>
Reviewed-by: Eric Roman <eroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654601}