Generators save and restore stack handlers
This CL adds machinery to unwind stack handlers from the stack and store
them into a generator's operand array. It also includes routines to
reinstate them. Together this allows generators to yield within
try/catch and try/finally blocks.
BUG=v8:2355
R=mstarzinger@chromium.org
TEST=mjsunit/harmony/generators-iteration
Review URL: https://codereview.chromium.org/
14031028
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14586
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00