Revert 78883 - Add field trial & prerendering information to Net.HttpTimeToFirstByte
Revert 78883 - Add field trial & prerendering information to Net.HttpTimeToFirstByte

BUG=70957
TEST=about:histograms/Net.HttpTimeToFirstByte

Review URL: http://codereview.chromium.org/6685030

TBR=gavinp@chromium.org
Review URL: http://codereview.chromium.org/6712060

git-svn-id: http://src.chromium.org/svn/trunk/src@78886 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: ee6420a7f4d694ee4c154823176e96c95b27b4f6
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