port 6470ddad (r36950)

  original commit message:
  This introduces SilenceNaN operator, which makes sure that we only
  store quiet NaNs into holey arrays. We omit the NaN silencing code
  at instruction selection time if the input is an operation that
  cannot possibly produce signalling NaNs.

BUG=

Review-Url: https://codereview.chromium.org/2099143002
Cr-Commit-Position: refs/heads/master@{#37265}