Add @cpu and @jschuh as owners for content/common/sandbox_policy.cc

Review URL: https://chromiumcodereview.appspot.com/10178005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@133461 0039d316-1c4b-4281-b951-d872f2087c98

content/common/OWNERS

 # For sandbox_init_linux.cc
 cevans@chromium.org
+
+# For sandbox_policy.cc
+jschuh@chromium.org
+cpu@chromium.org