[Streams API] ReadableStream reader should not be disposable when having pending promises

[youenn fablet]

Currently, ReadableJSStream::Reader is disposed as soon as the JS scripts loose reference to it.
Once disposed, the stream is released, which forbids resolving promises when the stream is changing, like going to close state.
This happens even if the closed promise is actually set. 
The reader should be kept alive as long as there are pending promises to the reader and the stream can change of state.

[youenn fablet]

Created attachment 252883 [details]
Patch

[Darin Adler]

Comment on attachment 252883 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=252883&action=review

> Source/WebCore/Modules/streams/ReadableStreamReader.cpp:80
> +    RefPtr<ReadableStreamReader> protect(this);

We should use Ref for this now, not RefPtr.

> Source/WebCore/bindings/js/ReadableJSStream.cpp:182
> +    Ref<Reader> reader =  adoptRef(*new Reader(stream));

Extra space on this line.

[youenn fablet]

Created attachment 252942 [details]
Patch for landing

[WebKit Commit Bot]

Comment on attachment 252942 [details]
Patch for landing

Clearing flags on attachment: 252942

Committed r184159: <http://trac.webkit.org/changeset/184159>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.