This is C++11 STL.

BUG=459399

Change-Id: I2e994e6b47535bcb38c193db2aaecc304e388772
Reviewed-on: https://chromium-review.googlesource.com/250581Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>