GitLab

Rewrite safe_browsing_util::GetHashIndex() and GetUrlHashIndex() to use
sensible return types rather than transitioning to/from int.  Pull them
into database_manager.cc, which was the only place they were used.

BUG=none

Review URL: https://codereview.chromium.org/337723004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@277997 0039d316-1c4b-4281-b951-d872f2087c98