Clean up and simplify how we deal with filename extensions on Windows. Allow users to use any name or extension they want, and only append the "desired" extension when the user's name doesn't have any known extension. Original patch by Jared Wein (see http://codereview.chromium.org/2825010 ), r=me.
BUG=7499
TEST=Right-click on link, choose "Save link as...", leave the file type as the default but change the file name to have a different extension. Ensure that the browser doesn't append the original extension.
Review URL: http://codereview.chromium.org/2893001
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51870 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed
