GitLab

1) C4146 (unary minus operator applied to unsigned type, result still unsigned) for
   constexpr size_t dynamic_extent = -1;

2) Workarounds for ternary expressions in templates (parens currently needed).

BUG=

Change-Id: Ia5d4ded07e819589800e957ce8cf369ddd6cd4ac
Reviewed-on: https://chromium-review.googlesource.com/1042806Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#555966}