Temporarily bring in code from the async package.

Temporarily bring in code from the async package.

StreamQueue.fork and CancelableFuture will (hopefully) land in async,
but we're putting them here for now to avoid being blocked.

R=kevmoo@google.com

Committed: https://github.com/dart-lang/test/commit/13cee2cd2f64b1fbe119f63cb284bcdd106d7d96

[kevmoo, 2015-07-29 23:03:46]

lgtm

https://codereview.chromium.org/1262623006/diff/1/lib/src/util/cancelable_fut...
File lib/src/util/cancelable_future.dart (right):

https://codereview.chromium.org/1262623006/diff/1/lib/src/util/cancelable_fut...
lib/src/util/cancelable_future.dart:87: CancelableFuture catchError(Function
onError, {bool test(error)}) =>
docs for these?

[nweiz, 2015-07-29 23:18:10]

https://codereview.chromium.org/1262623006/diff/1/lib/src/util/cancelable_fut...
File lib/src/util/cancelable_future.dart (right):

https://codereview.chromium.org/1262623006/diff/1/lib/src/util/cancelable_fut...
lib/src/util/cancelable_future.dart:87: CancelableFuture catchError(Function
onError, {bool test(error)}) =>
On 2015/07/29 23:03:46, kevmoo wrote:
> docs for these?

Generally you shouldn't document inherited members when their semantics are the
same as the original. DartDoc automatically includes the parent docs and
repeating them just gives them a chance to get out-of-sync.

[nweiz, 2015-07-29 23:18:30]

Committed patchset #1 (id:1) manually as
13cee2cd2f64b1fbe119f63cb284bcdd106d7d96 (presubmit successful).