Add titzer@ to owners file.

R=danno@chromium.org
BUG=

Review URL: https://codereview.chromium.org/25269002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17008 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

OWNERS

@@ -8,6 +8,7 @@ mstarzinger@chromium.org
 mvstanton@chromium.org
 rossberg@chromium.org
 svenpanne@chromium.org
+titzer@chromium.org
 ulan@chromium.org
 vegorov@chromium.org
 verwaest@chromium.org