Paul Berry
0c31815f1c
This is the same as 1d028eed8d (which
was reverted) except that it doesn't remove the old AST factory
constructors (which broke dev_compiler). The removal of old AST
factory constructors will be done in a follow-up CL so that if it
unexpectedly breaks any other clients we will be able to revert it
without reverting this CL.
R=scheglov@google.com
Review URL: https://codereview.chromium.org/2536373008 .