IE10 nows supports stack traces. See http://blogs.msdn.com/b/ie/archive/2012/05/10/diagnosing-javascript-errors-faster-with-error-stack.aspx.
This cl adds IE10 stack trace support to closure.

R=pallosp
DELTA=76 (70 added, 0 deleted, 6 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=6151


git-svn-id: http://closure-library.googlecode.com/svn/trunk@2446 0b95b8e8-c90f-11de-9d4f-f947ee5921c8