Fix typo in watchlist: s/chromum/chromium/
Fix typo in watchlist: s/chromum/chromium/

TBR=abarth

Review URL: https://codereview.chromium.org/14593011

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@150366 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs