Checklist:

fileReader.html (probably caused by ArrayBuffer as well):
- FileReader States -- abort
- FileReader States -- events
FileReaderSync.worker.js
- readAsText
idlharness.worker.js
- URL interface: operation createFor(Blob)
- FileReader interface
  - ArrayBuffer related ones
  - readAsBinaryString
- FileReaderSync interface
- existence and properties of interface object:
  - Windows
  - ArrayBuffer
  - URL
  - EventTarget
idlharness.html
- URL interface: operation createFor(Blob)
- FileReader interface
  - ArrayBuffer related ones
  - readAsBinaryString
- FileReaderSync
url_createobjecturl_blob.html
- Check if the Blob URI starts with 'blob' using createFor()
Determining-Encoding.html (also blocked by ArrayBuffer)
FileReader-multiple-reads.html
- ArrayBuffer related ones
filereader_readAsArrayBuffer.html
filereader_result.html
- readAsArrayBuffer
File-constructor.html
- ArrayBuffer related ones
Blob-constructor.html
- Passing non-objects, Dates and RegExps for blobParts should throw a TypeError.
- ArrayBuffer ones
- Passing an platform object that supports indexed properties as the blobParts array should work (select).
- Passing a FrozenArray as the blobParts array should work (FrozenArray).

Pass the FileAPI test suite. #10778

Description