Leave the 'Make Chrome Default' button enabled on Windows if not already default.
Leave the 'Make Chrome Default' button enabled on Windows if not already default.

BUG=27403
TEST=As described in the bug above.

Review URL: http://codereview.chromium.org/408004

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@32362 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