Unified error handling for WritableStream

Unified error handling for WritableStream

Port the standard changes in
https://github.com/whatwg/streams/pull/721.

There are a number of behavioural changes related to error handling, which are
listed at the above URL. This implementation has no known deviations from the
standard.

The brings this implementation up to parity with
https://github.com/whatwg/streams/commit/e7bf9293d3e0b26f9221dada3723e31707db8c32.

The version of this CL merged to M59 branch 3071 adds failing and time-out test
expectations since the tests on hte branch are now out-of-date with respect to
the implementation. See http://crbug.com/713664.

BUG=711254, 684543
Review-Url: https://codereview.chromium.org/2823563002
Cr-Commit-Position: refs/heads/master@{#465498}
(cherry picked from commit 6703f4df6ad92a629ea4ac736f6ff26402ef139e)

Review-Url: https://codereview.chromium.org/2831763003 .
Cr-Commit-Position: refs/branch-heads/3071@{#82}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/f703afd1326015ab595fb8e857df55c765f0c9e7

[Adam Rice, 2017-04-20 13:19:03]

Description was changed from

==========
Unified error handling for WritableStream

Port the standard changes in
https://github.com/whatwg/streams/pull/721.

There are a number of behavioural changes related to error handling, which are
listed at the above URL. This implementation has no known deviations from the
standard.

The brings this implementation up to parity with
https://github.com/whatwg/streams/commit/e7bf9293d3e0b26f9221dada3723e31707db....

The version of this CL merged to M59 branch 3071 adds failing and time-out test
expectations since the tests on hte branch are now out-of-date with respect to
the implementation. See http://crbug.com/713664.

BUG=711254,684543

Review-Url: https://codereview.chromium.org/2823563002
Cr-Commit-Position: refs/heads/master@{#465498}
(cherry picked from commit 6703f4df6ad92a629ea4ac736f6ff26402ef139e)
==========

to

==========
Unified error handling for WritableStream

Port the standard changes in
https://github.com/whatwg/streams/pull/721.

There are a number of behavioural changes related to error handling, which are
listed at the above URL. This implementation has no known deviations from the
standard.

The brings this implementation up to parity with
https://github.com/whatwg/streams/commit/e7bf9293d3e0b26f9221dada3723e31707db....

The version of this CL merged to M59 branch 3071 adds failing and time-out test
expectations since the tests on hte branch are now out-of-date with respect to
the implementation. See http://crbug.com/713664.

BUG=711254,684543

Review-Url: https://codereview.chromium.org/2823563002
Cr-Commit-Position: refs/heads/master@{#465498}
(cherry picked from commit 6703f4df6ad92a629ea4ac736f6ff26402ef139e)

Review-Url: https://codereview.chromium.org/2831763003 .
Cr-Commit-Position: refs/branch-heads/3071@{#82}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/f703afd1326015ab595fb8e857df...
==========

[Adam Rice, 2017-04-20 13:19:05]

Committed patchset #1 (id:1) manually as
f703afd1326015ab595fb8e857df55c765f0c9e7.