port 0ed08780 (r32642)

  original commit message:
  There's no reason to limit the CompareIC to (known) JSObject instances,
  as all JSReceivers behave the same wrt. abstract and strict equality.
  So remove this historical limitation and track JSReceivers instead.

BUG=

Review URL: https://codereview.chromium.org/1501373003

Cr-Commit-Position: refs/heads/master@{#32645}