Fix broken console evaluation in devtools when stopped at an async frame.

Fix broken console evaluation in devtools when stopped at an async frame.

It appears that the Dart VM is now adding a local with invalid dart name :async_op
in some cases when the call stack is async.
This change filters out those variables from the list of locals.

BUG=
R=alanknight@google.com

Committed: https://github.com/dart-lang/sdk/commit/9075efbb432a2e5da5b725c3331e05eedfebd795

[Jacob, 2015-10-27 22:12:14]

jacobr@google.com changed reviewers:
+ alanknight@google.com

[Jacob, 2015-10-27 22:13:23]

Description was changed from

==========
Fix broken console evaluation in devtools when stopped at an async frame.

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

to

==========
Fix broken console evaluation in devtools when stopped at an async frame.

It appears that the Dart VM is now adding a local with invalid dart name
:async_op
in some cases when the call stack is async.
This change filters out those variables from the list of locals.

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

[Alan Knight, 2015-10-27 22:20:08]

lgtm, with nit

https://codereview.chromium.org/1424133002/diff/1/tools/dom/src/native_DOMImp...
File tools/dom/src/native_DOMImplementation.dart (right):

https://codereview.chromium.org/1424133002/diff/1/tools/dom/src/native_DOMImp...
tools/dom/src/native_DOMImplementation.dart:269: // Avoid being broken by bogus
:async_op local returned passed in when
returned passed in?

[Jacob, 2015-10-28 22:00:37]

Committed patchset #2 (id:10001) manually as
9075efbb432a2e5da5b725c3331e05eedfebd795 (presubmit successful).