X87: [es6] Initial steps towards a correct implementation of IsCallable.
port
8a378f46d52ce64578c71313ed76a67592fbf63c (r30552)
original commit message:
This turns the has_instance_call_handler bit on Map into an is_callable
bit, that matches the spec definition of IsCallable (i.e. instances have
[[Call]] internal methods).
Also fix the typeof operator to properly say "function" for everything
that is callable.
Also remove the (unused) premature %_GetPrototype optimization from
Crankshaft, which just complicated the Map bit swap.
BUG=
Review URL: https://codereview.chromium.org/
1310653004
Cr-Commit-Position: refs/heads/master@{#30609}