port b6419fa2 (r34959)

  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.

BUG=

Review URL: https://codereview.chromium.org/1821113002

Cr-Commit-Position: refs/heads/master@{#34975}