port ba092fb0 (r37971)

  original commit message:
  So far we don't have a useful way to inline Math.max or Math.min in
  TurboFan optimized code. This adds new operators NumberMax and NumberMin
  and changes the Float64Max/Float64Min operators to have JavaScript
  semantics instead of the C++ semantics that it had previously.

  This also removes support for recognizing the tenary case in the
  CommonOperatorReducer, since that doesn't seem to have any positive
  impact (and actually doesn't show up in regular JavaScript, where
  people use Math.max/Math.min instead).

BUG=

  Drive-by-fix: Also nuke the unused Float32Max/Float32Min operators.
Review-Url: https://codereview.chromium.org/2187463005

Cr-Commit-Position: refs/heads/master@{#38119}