Set the job name for the print job on the Mac.

BUG=http://crbug.com/29188
TEST=as in bug

Review URL: http://codereview.chromium.org/1997016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@47056 0039d316-1c4b-4281-b951-d872f2087c98
  CallbackHandler(PrintingContext& owner, HWND owner_hwnd)
      : owner_(owner),
        owner_hwnd_(owner_hwnd),
        services_(NULL) {
  }

  CallbackHandler(PrintingContext& owner, HWND owner_hwnd)
      : owner_(owner),
        owner_hwnd_(owner_hwnd),
        services_(NULL) {
  }
