Remove unnecessary DCHECK causing unit test failure.
Remove unnecessary DCHECK causing unit test failure.

BUG=none
TEST=GoogleUpdateSettings::SetCollectStatsConsent
TBR=cevans

Review URL: http://codereview.chromium.org/6281008

git-svn-id: http://src.chromium.org/svn/trunk/src@71773 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: f40a07c8398196547125d404ec26d59a6abdc66b
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser