Make the NNTP always request a new theme CSS
Make the NNTP always request a new theme CSS

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/160240

git-svn-id: http://src.chromium.org/svn/trunk/src@21793 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 567273679166a66ff5f174c54ccaae83eaa27629
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