TBR veyron-browser: merucry => mercury
TBR veyron-browser: merucry => mercury

As title says. A warmup CL for my MacBook.

Change-Id: Ic1d5a16b3ef5c5a88affbc4f6b9c495c8ca3e23c

vanadium/browser,vanadium/browser,vanadium/browser,vanadium/browser