Added stale values that used to be used for the Download.CountsChrome  histogram.
Added stale values that used to be used for the Download.CountsChrome 
histogram.

These are needed due to an incorrect refactor in http://codereview.chromium.org/9316116.

BUG=None

Review URL: http://codereview.chromium.org/9419015

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@122562 0039d316-1c4b-4281-b951-d872f2087c98

ropik/chromium,adobe/chromium,adobe/chromium,ropik/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,ropik/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,yitian134/chromium,yitian134/chromium,yitian134/chromium,adobe/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,adobe/chromium,gavinp/chromium