Change FileReader.error to DOMException from obsoleted FileError

[Tetsuharu Ohzeki [UTC+9]]

By the spec https://w3c.github.io/FileAPI/, FileReader.error should be DOMException now.

[Tetsuharu Ohzeki [UTC+9]]

Created attachment 401714 [details]
Patch

[Tetsuharu Ohzeki [UTC+9]]

Created attachment 401719 [details]
Patch

[Tetsuharu Ohzeki [UTC+9]]

Created attachment 401726 [details]
Patch

fix test expectations for wk1

[Chris Dumez]

Comment on attachment 401726 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=401726&action=review

r=me with changes.

> Source/WebCore/fileapi/FileReader.cpp:226
> +        RefPtr<DOMException> exception = DOMException::create(e.exception());

We don't need this local variable. This can be:
m_error = DOMException::create(e.exception());

> Source/WebCore/fileapi/FileReader.h:73
> +    RefPtr<DOMException> error() { return m_error; }

This should return a DOMException*, not need to ref:
DOMException* error() const { return m_error.get(); }

> Source/WebCore/fileapi/FileReader.idl:55
> +    readonly attribute DOMException error;

This should be:
readonly attribute DOMException? error;

As per spec, since it can return null.

[Tetsuharu Ohzeki [UTC+9]]

Created attachment 401731 [details]
Patch

Thank you, Chris. I addressed your review in this patch. (I don't have a committer grant so I need to request the review to you again)

[EWS]

Committed r262953: <https://trac.webkit.org/changeset/262953>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 401731 [details].

[Radar WebKit Bug Importer]

<rdar://problem/64299522>