for the try servers and fallback on EMAIL_ADDRESS, since 
WebKit uses that. 

The reason is that some people have WebKit emails that 
predate Chromium emails so some separation is warranted 
so that people don't have to fix up emails all the time. 

BUG=None 
TEST=None 
Original review: http://codereview.chromium.org/372048


git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@31437 0039d316-1c4b-4281-b951-d872f2087c98