This commit fixes the register usage of DIRECT_API_CALL_NEW
and DIRECT_GETTER_CALL_NEW:
* These functions expect arguments in a0-a1 and not in a1-a2
as the and DIRECT_API_CALL and DIRECT_GETTER_CALL do.
* Fixes the simulator to expect *_NEW arguments in a0-a1.
* Adds more comment to simulator to better explain the
register usage.
TEST=cctest/test-api/LoadICFastApi_DirectCall_GCMoveStub,cctest/test-api/SimpleCallback
BUG=
Review URL: https://codereview.chromium.org/15813005
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14813 ce2b1a6d-e550-0410-aec6-3dcde31c8c00