Port b6419fa2

Original commit message:
    Now implemented as a builtin that delegates to the InstanceOfStub. That
    stub was parameterized to fallback to either Runtime_InstanceOf or to
    Runtime_OrdinaryHasInstance depending on the --harmony-instanceof flag.
    Once the feature stabilizes and the flag is no longer needed, we can get
    rid of this parameterization again.

R=mstarzinger@chromium.org, joransiu@ca.ibm.com, mbrandy@us.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:4447
LOG=n

Review URL: https://codereview.chromium.org/1827583002

Cr-Commit-Position: refs/heads/master@{#35025}