Similar to create() in LibJS, wrap() et al. are on a low enough level to
warrant passing a Realm directly instead of relying on the current realm
from the VM, as a wrapper may need to be allocated while no JS is being
executed.
This patch passes the options argument to process_blob_parts() and makes
use of the "convert line endings to native" algorithm when the endings
member of options (BlobPropertyBag) is set to "native".
Blob::bytes() returns the ReadonlyBytes representation of our internal
ByteBuffer.
This change requires us to ByteBuffer::copy() Blob's ReadonlyBytes to a
ByteBuffer in XHR::send() and corresponding error handling of the copy
operation.
This removes the need for Blob to declare XMLHttpRequest as a friend
class.
