Await cancellation in the Kernel await transformer

Await cancellation in the Kernel await transformer

When an an async for loop's StreamIterator is canceled the returned
Future should be awaited.  Closes issue 29192.

BUG=https://github.com/dart-lang/sdk/issues/29192
R=ahe@google.com

Committed: https://github.com/dart-lang/sdk/commit/4de94b2d7b09f7207b2de58c610d102d691d2e4b

[Kevin Millikin (Google), 2017-03-29 13:15:26]

Description was changed from

==========
Await cancellation in the Kernel await transformer

When an an async for loop's StreamIterator is canceled the returned
Future should be awaited.

BUG=
==========

to

==========
Await cancellation in the Kernel await transformer

When an an async for loop's StreamIterator is canceled the returned
Future should be awaited.  Closes issue 29192.

BUG=https://github.com/dart-lang/sdk/issues/29192
==========

[Kevin Millikin (Google), 2017-03-29 13:16:08]

kmillikin@google.com changed reviewers:
+ ahe@google.com, lrn@google.com

[ahe, 2017-03-29 13:19:57]

lgtm

[Kevin Millikin (Google), 2017-03-29 13:20:29]

Description was changed from

==========
Await cancellation in the Kernel await transformer

When an an async for loop's StreamIterator is canceled the returned
Future should be awaited.  Closes issue 29192.

BUG=https://github.com/dart-lang/sdk/issues/29192
==========

to

==========
Await cancellation in the Kernel await transformer

When an an async for loop's StreamIterator is canceled the returned
Future should be awaited.  Closes issue 29192.

BUG=https://github.com/dart-lang/sdk/issues/29192
R=ahe@google.com

Committed:
https://github.com/dart-lang/sdk/commit/4de94b2d7b09f7207b2de58c610d102d691d2e4b
==========

[Kevin Millikin (Google), 2017-03-29 13:20:30]

Committed patchset #1 (id:1) manually as
4de94b2d7b09f7207b2de58c610d102d691d2e4b (presubmit successful).