GitLab

There is a large piece of code within |HQP::DoAutocomplete()| that can
be on its own trivially. This change moves it to another method, and
should not change behavior. This is to facilitate a downstream change.

Bug: 
Change-Id: Ifdbbac697aee1efd0f42068f2e0825bb176a8076
Reviewed-on: https://chromium-review.googlesource.com/747064
Commit-Queue: Kevin Bailey <krb@chromium.org>
Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513013}