Remove spurious call to captureStackTrace.

Remove spurious call to captureStackTrace.

Just creating an Error object is sufficient on FF,
Chrome, Safari, and Edge. Note that captureStackTrace
was not supported by other browsers so those browsers
were going down the even slower path of throwing an
exception.

BUG=
R=vsm@google.com

Committed: https://github.com/dart-lang/sdk/commit/f3c33b047d5dee4d57c867f7a28500c18570c28a

[Jacob, 2017-01-30 21:28:39]

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

[Jacob, 2017-01-30 21:28:40]

Remove spurious call to captureStackTrace.

Just creating an Error object is sufficient on FF,
Chrome, Safari, and Edge. Note that captureStackTrace
was not supported by other browsers so those browsers
were going down the even slower path of throwing an
exception.

[vsm, 2017-01-30 21:29:32]

lgtm!

[Jacob, 2017-01-30 21:30:38]

Description was changed from

==========
Remove spurious call to captureStackTrace.

Just creating an Error object is sufficient on FF,
Chrome, Safari, and Edge. Note that captureStackTrace
was not supported by other browsers so those browsers
were going down the even slower path of throwing an
exception.

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

to

==========
Remove spurious call to captureStackTrace.

Just creating an Error object is sufficient on FF,
Chrome, Safari, and Edge. Note that captureStackTrace
was not supported by other browsers so those browsers
were going down the even slower path of throwing an
exception.

BUG=
R=vsm@google.com

Committed:
https://github.com/dart-lang/sdk/commit/f3c33b047d5dee4d57c867f7a28500c18570c28a
==========

[Jacob, 2017-01-30 21:30:39]

Committed patchset #1 (id:1) manually as
f3c33b047d5dee4d57c867f7a28500c18570c28a (presubmit successful).