GitLab

Add a missing 'clang::' namespace qualifier.

TBR=thakis@chromium.org
NOTRY=True
BUG=841908

Change-Id: I60e48efbfd92017a3802e9f74d77a9ddcb307b27
Reviewed-on: https://chromium-review.googlesource.com/1054527Reviewed-by: Reid Kleckner <rnk@chromium.org>
Commit-Queue: Reid Kleckner <rnk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557670}