For binary operations that collect feedback (in Ignition), don't
canonicalize when the operation itself is already performed in
Float64. This is the first step to fix the performance difference
we still see between TurboFan and TurboFan+Ignition.

R=mythria@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2431363002
Cr-Commit-Position: refs/heads/master@{#40428}