Automatic update from web-platform-tests
navigation-api/navigation-history-entry/entries-after-blob-navigation.html doesn't run in WebKit (#49553)
Pass the content type when constructing the Blob so that it is guaranteed to be
rendered inside the iframe. Without specifying the content type, Gecko was treating
treating the blob as HTML, Blink was treating it as text and WebKit was treating it
as binary and downloading it instead of rendering it inside the iframe.
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wpt-commits: 21a583a6e7947a1012efce590a2d0cda34829c75
wpt-pr: 49553
380bb2972d