Remove a variety of defunct flags.

BUG=350163, 350166, 350174

Review URL: https://codereview.chromium.org/191823002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@257014 0039d316-1c4b-4281-b951-d872f2087c98
Do not use TEST_P for looping over all known region codes.

This change reduces the number of unit tests in libaddressinput from 2305
to 143. The test runtime is reduced from 9.7 to 7.8 seconds in debug mode.

BUG=347399

Review URL: https://codereview.chromium.org/196973005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@257015 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 257014
SVN changes up to revision 257015