Reason for revert:
Waterfall redness.
Original issue's description:
> [turbofan] Initial support for monomorphic/polymorphic property loads.
>
> Native context specialization now lowers monomorphic and
> polymorphic accesses to data and constant data properties on
> object and/or prototype chain. We don't deal with accessors
> yet, and we also completely ignore proxies (which is compatible
> with what Crankshaft does).
>
> The code is more or less the straightforward implementation. We
> will need to refactor that and extract common patterns once the
> remaining bits for full load/store support is in.
>
> CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel
> R=jarin@chromium.org
> BUG=v8:4470
> LOG=n
>
> Committed: https://crrev.com/3a0bf860b7177f7abef01ff308a53603389d958e
> Cr-Commit-Position: refs/heads/master@{#31340}
TBR=bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4470
Review URL: https://codereview.chromium.org/1408123002
Cr-Commit-Position: refs/heads/master@{#31341}
5c53481233