Drop "U;" from the UA string.  This parallels https://bugs.webkit.org/show_bug.cgi?id=54566 and also matches a change in Firefox 4.
Drop "U;" from the UA string.  This parallels https://bugs.webkit.org/show_bug.cgi?id=54566 and also matches a change in Firefox 4.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/6576043

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@75955 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser