David Aurelio fd3a0ba781 Play nice with fetch after the newest changes that add support for XMLHttpRequest.response
Summary:After adding support for `XMLHttpRequest#response`, the `fetch` polyfill detects buffer support when debugging in Chrome and sets `responseType` to `'blob'`.
In that case, the response was always empty.

This change will construct a blob if `responseType` has been set to `'blob'` in order to avoid that problem

Reviewed By: steveluscher

Differential Revision: D3018884

fb-gh-sync-id: 4ade0413de67242c3565d95c2880d4a981ba2342
shipit-source-id: 4ade0413de67242c3565d95c2880d4a981ba2342
2016-03-07 13:30:41 -08:00
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2016-02-15 13:34:33 -08:00
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