Fix Geolocation OWNERS.

Per-file specs do not recurse, so we need to have separate specs in each
directory that sit next to the files.

BUG=NONE

Review URL: https://codereview.chromium.org/72043005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235993 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235993