Adds gunsch@ to chromecast/ WATCHLISTS.

[email protected]
BUG=None

Review URL: https://codereview.chromium.org/686873002

Cr-Commit-Position: refs/heads/master@{#301679}
diff --git a/WATCHLISTS b/WATCHLISTS
index c8fbc502..6898f93d 100644
--- a/WATCHLISTS
+++ b/WATCHLISTS
@@ -825,7 +825,7 @@
     'cc': ['[email protected]'],
     'chrome_elf': ['[email protected]',],
     'chrome_views': ['[email protected]'],
-    'chromecast': ['[email protected]'],
+    'chromecast': ['[email protected]', '[email protected]'],
     'chromedriver': ['[email protected]', '[email protected]'],
     'chromeos' : ['[email protected]',
                   '[email protected]'],