Propagate the stack trace of the inner-most throw when using async/await.

Propagate the stack trace of the inner-most throw when using async/await.

This patch does not provide a full async stack trace, it only ensures
that the inner-most stack frame will be the point of the initial throw.

BUG=http://dartbug.com/22009
R=iposva@google.com

Committed: https://code.google.com/p/dart/source/detail?r=43463

[Ivan Posva, 2015-02-04 10:29:42]

LGTM -ip

[zerny-google, 2015-02-04 11:54:34]

Committed patchset #1 (id:1) manually as 43463 (presubmit successful).

[hausner, 2015-02-04 16:47:32]

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

[hausner, 2015-02-04 16:47:33]

DBC

https://codereview.chromium.org/893193004/diff/1/runtime/vm/parser.cc
File runtime/vm/parser.cc (right):

https://codereview.chromium.org/893193004/diff/1/runtime/vm/parser.cc#newcode...
runtime/vm/parser.cc:3074: // * A continuation error.
Comment is now out of sync with the code.

[hausner, 2015-02-04 16:50:56]

Btw, I can take care of updating the comments with my sync* check-in.

[zerny-google, 2015-02-04 18:08:13]

On 2015/02/04 16:50:56, hausner wrote:
> Btw, I can take care of updating the comments with my sync* check-in.

Thanks! That would be great. I don't have a VM cl in the queue atm.