Implement Isolate.pause in dart2js.

Implement Isolate.pause in dart2js.

This is a trivial implementation of Isolate.pause.
It introduces out-of-band control messages to the control port
int a simple way (if receiveport == controlport treat specially).

Control port is now created for each isolate, along with a Capability allowing
pausing.

R=floitsch@google.com

Committed: https://code.google.com/p/dart/source/detail?r=32485

[Lasse Reichstein Nielsen, 2014-02-07 13:52:00]

Feel free to add more reviewers.

Siva: Do you see any problems in implementing similar semantics in the VM?

[floitsch, 2014-02-07 15:40:16]

LGTM.

https://codereview.chromium.org/153553009/diff/1/tests/isolate/pause_test.dart
File tests/isolate/pause_test.dart (right):

https://codereview.chromium.org/153553009/diff/1/tests/isolate/pause_test.dar...
tests/isolate/pause_test.dart:35: return new Future.delayed(const
Duration(milliseconds: /*25*/0));
on purpose?

https://codereview.chromium.org/153553009/diff/1/tests/isolate/pause_test.dar...
tests/isolate/pause_test.dart:39: print("Success");
debug?

[Lasse Reichstein Nielsen, 2014-02-10 08:33:21]

Committed patchset #2 manually as r32485 (presubmit successful).

[Lasse Reichstein Nielsen, 2014-02-10 08:41:26]

https://codereview.chromium.org/153553009/diff/1/tests/isolate/pause_test.dart
File tests/isolate/pause_test.dart (right):

https://codereview.chromium.org/153553009/diff/1/tests/isolate/pause_test.dar...
tests/isolate/pause_test.dart:35: return new Future.delayed(const
Duration(milliseconds: /*25*/0));
To make it run in d8 while testing.
Will remove now, and mark as failng in d8.

https://codereview.chromium.org/153553009/diff/1/tests/isolate/pause_test.dar...
tests/isolate/pause_test.dart:39: print("Success");
On 2014/02/07 15:40:16, floitsch wrote:
> debug?

Done.