Update owners file for third_party.

third_party/OWNERS

Index: third_party/OWNERS
diff --git a/third_party/OWNERS b/third_party/OWNERS
index 4a47bf8ff32ba13881a84fa95a2b86449ccf02ed..bb69b25ce7501db534dcfa923cf67f7e87839a7c 100644
--- a/third_party/OWNERS
+++ b/third_party/OWNERS
@@ -1,9 +1,20 @@
 # Owner approval for 3rd party is only required for
 # adding new libraries. Be sure to follow the instructions for adding
 # new third party libraries.
+#
 # http://www.chromium.org/developers/adding-3rd-party-libraries
 #
-# For changes to existing code simply TBR= one of people below.
+# For changes to existing code that has no OWNER file, simply TBR= one of
+# people below in addition to getting an appropriate code review. Generally
+# third_party modules should have owners, so if you find yourself doing this
+# more than once or twice for a directory, consider adding an OWNER file. If
+# you're making changes and there isn't a more obvious person, the owner is
+# probably you!
 
-cpu@chromium.org
-darin@chromium.org
+ben@chromium.org
+brettw@chromium.org
+dglazkov@chromium.org
+jam@chromium.org
+jochen@chromium.org
+klobag@chromium.org
+sky@chromium.org