Add a heartbeat for the test timeout.

Add a heartbeat for the test timeout.

Closes #10

R=kevmoo@google.com

Committed: https://github.com/dart-lang/test/commit/39b2a8c77fa36ae8fa2af77ff422f358fa9d848e

[nweiz, 2015-05-28 22:52:55]

nweiz@google.com changed reviewers:
+ rnystrom@google.com

[kevmoo, 2015-05-29 01:26:45]

kevmoo@google.com changed reviewers:
+ kevmoo@google.com

[kevmoo, 2015-05-29 01:26:46]

LGTM w/ comment

https://codereview.chromium.org/1156493010/diff/1/lib/src/backend/invoker.dart
File lib/src/backend/invoker.dart (right):

https://codereview.chromium.org/1156493010/diff/1/lib/src/backend/invoker.dar...
lib/src/backend/invoker.dart:163: var timeout = metadata.timeout.apply(new
Duration(seconds: 30));
This implies that 30s is the max time allowed between async actions before a
timeout happens?

At least a to-do to make this plug-able?

[nweiz, 2015-05-29 20:25:39]

https://codereview.chromium.org/1156493010/diff/1/lib/src/backend/invoker.dart
File lib/src/backend/invoker.dart (right):

https://codereview.chromium.org/1156493010/diff/1/lib/src/backend/invoker.dar...
lib/src/backend/invoker.dart:163: var timeout = metadata.timeout.apply(new
Duration(seconds: 30));
On 2015/05/29 01:26:46, kevmoo wrote:
> This implies that 30s is the max time allowed between async actions before a
> timeout happens?
> 
> At least a to-do to make this plug-able?

This is already pluggable via the @Timeout annotation.

[nweiz, 2015-05-29 20:25:55]

Committed patchset #1 (id:1) manually as
39b2a8c77fa36ae8fa2af77ff422f358fa9d848e (presubmit successful).