Add kinuko@ and horo@ to content/worker and content/browser/worker_host OWNERS

BUG=none
NOTRY=true

Review URL: https://codereview.chromium.org/149793005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249706 0039d316-1c4b-4281-b951-d872f2087c98
Mark AppApiTest.AppProcessRedirectBack flaky.

BUG=341898

Review URL: https://codereview.chromium.org/149293006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249707 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249707