Revert 75900 - Set the standard font from 'serif' family font.
This is regardless of serif/sans-serif preference, because we don't
have such pref UI for now.
Otherwise some languages (CJK), which has sans-serif as a default
font (IDS_STANDARD_FONT_IS_SERIF = false), they have no way to
select a standard fallback font.
Note that this is a temporary workaround that needs more fundamental fix.
BUG=73845, chromium-os:12311
TEST=manually (in Japanese, set the font and go to http://www.asahi.com )
Review URL: http://codereview.chromium.org/
6568006
TBR=csilv@chromium.org
Review URL: http://codereview.chromium.org/
6588004
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@76036 0039d316-1c4b-4281-b951-d872f2087c98