Fix bug restoring of JS entry sp so to fix profiler-related valgrind issues.
The profiler did not correctly identify when there was a JS frame
on the stack after an exception was thrown.
I also refactored the code to use PopTryHandler macro-instructions on all platforms
BUG=73722
TEST=No more valgrind errors related to v8::internal::StackFrameIterator.
Review URL: http://codereview.chromium.org/
7019010
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7910
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00