Code review comment for lp:~michael-sheldon/webbrowser-app/general-download-support

Testing with the latest oxide built from trunk (revision 634) and ubuntu-download-manager built from revision 320 of https://code.launchpad.net/~mandel/ubuntu-download-manager/expose-property/+merge/223874, and downloading image attachments from gmail works. Trying to download an mp4 video attachment results in a message that tells me there is no app installed that can handle this type of content. Is that expected? The same happens for PDF, but I know this is expected.