While reviewing logs for flaky DAP tests, I found that these tests have been failing sometimes with errors that look like the isolate might not have paused on the `debugger()` call yet:
```
evaluateInFrame: (113) Expression compilation error
_buildExpressionEvaluationScope: invalid 'frameIndex' parameter: 0
```
and
```
evaluateInFrame: (113) Expression compilation error
org-dartlang-debug:synthetic_debug_expression:1:1: Error: Undefined name 'myInstance'.
myInstance
^^^^^^^^^^
```
This waits for the isolate to be paused, not just runnable, which I think might fix this.
Change-Id: Ib1d6b1c44a7ef93452065aa43c4d05058914db28
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/395302
Reviewed-by: Derek Xu <derekx@google.com>
Reviewed-by: Ben Konyi <bkonyi@google.com>
Commit-Queue: Ben Konyi <bkonyi@google.com>
Danny Tuppeny
a65067fb9d