port d3ed71ed(r42021)

  original commit message:
  Don't fallback to the %StrictEqual / %Equal runtime functions for the
  generic CompareIC slow path, but use the (new) StrictEqual and Equal
  builtins instead. This avoids a performance cliff when mixing input
  types for strict equality sites.

BUG=

Review-Url: https://codereview.chromium.org/2612693002
Cr-Commit-Position: refs/heads/master@{#42080}