Add 64-bit Windows tokens to the UA string.  This parallels https://bugs.webkit.org/show_bug.cgi?id=55226 as well as Firefox and IE.
Add 64-bit Windows tokens to the UA string.  This parallels https://bugs.webkit.org/show_bug.cgi?id=55226 as well as Firefox and IE.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/6627019

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@77012 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