Hash whitelist IDs for consistency and to demonstrate best
practices.

BUG=178780

Review URL: https://codereview.chromium.org/73053002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235849 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235849