Lazy call to custom stack trace formatting using Error.prepareStackTrace.

Lazy call to custom stack trace formatting using Error.prepareStackTrace.

This enables custom stack trace formatting for stack overflow.
A consequence is that stack trace formatting is now easily observable,
but we already established that the default stack trace formatting can
be observed anyways. It is only triggered by the .stack getter, and
it has to be explicitly called, (e.g. not implicitly after GC).

R=mstarzinger@chromium.org
BUG=v8:2559
Committed: https://code.google.com/p/v8/source/detail?r=15902

[Michael Starzinger, 2013-07-26 09:12:58]

LGTM with a nit.

https://codereview.chromium.org/20692002/diff/1/src/messages.js
File src/messages.js (right):

https://codereview.chromium.org/20692002/diff/1/src/messages.js#newcode1081
src/messages.js:1081: //Flag to prevent recursive call of
Error.prepareStackTrace.
nit: Missing white-space between "//" and comment.

[Yang, 2013-07-26 11:28:14]

Committed patchset #3 manually as r15902 (presubmit successful).