Add gcasto to password_manager WATCHLISTS

TBR=mkwst@chromium.org

Review URL: https://codereview.chromium.org/296133003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272086 0039d316-1c4b-4281-b951-d872f2087c98

WATCHLISTS

@@ -859,7 +859,8 @@
               'rjkroege@chromium.org'],
     'panels': ['dimich@chromium.org', 'jennb@chromium.org',
                'dcheng@chromium.org', 'jianli@chromium.org'],
-    'password_manager': ['mkwst+watchlist@chromium.org'],
+    'password_manager': ['mkwst+watchlist@chromium.org',
+                         'gcasto+watchlist@chromium.org'],
     'pepper_api': ['piman+watch@chromium.org', 'ihf+watch@chromium.org',
                    'yusukes+watch@chromium.org', 'raymes+watch@chromium.org',
                    'noelallen@chromium.org', 'binji+watch@chromium.org',