[Bug 9516] New: Steam "Purchase" links do not work

http://bugs.winehq.org/show_bug.cgi?id=9516

Summary: Steam "Purchase" links do not work
           Product: Wine
           Version: CVS/GIT
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: wine-misc
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

When clicking on a "Purchase" link in the Steam store, inside the Steam client,
no purchase dialog appears; instead, the embedded browser appears completely
white.

(Steam uses special "steam:" URLs for the purchase links. They're probably not
handled correctly.)