Re: [fetch-tests] Use correct MIME type for multipart form data. (#3879)

I rebased on top of master, resolved conflicts caused by #3948 and improved based on that commit. Please take a look.

View on GitHub: https://github.com/w3c/web-platform-tests/pull/3879#issuecomment-254533878

Received on Tuesday, 18 October 2016 14:56:35 UTC