Revert of X87: Reimplement Maps and Sets in JS (patchset #1 id:1 of https://codereview.chromium.org/
1066373002/)
Reason for revert:
Reverting as it resulted in a closed waterfall.
Original issue's description:
> X87: Reimplement Maps and Sets in JS
>
> port
909500aa1db9789b68e101045a6359a7fcb30e83 (r27605)
>
> original commit message:
> Previously, the only optimized code path for Maps and Sets was for String keys.
> This was achieved through an implementation of various complex operations
> in Hydrogen. This approach was neither scalable nor forward-compatible.
>
> This patch adds the necessary intrinsics to implement Maps and Sets almost entirely
> in JS. The added intrinsics are:
>
> %_FixedArrayGet
> %_FixedArraySet
> %_TheHole
> %_JSCollectionGetTable
> %_StringGetRawHashField
>
> With these additions, as well as a few changes to what's exposed as runtime functions,
> most of the C++ code backing Maps and Sets is gone (including both runtime code in
> objects.cc and Crankshaft in hydrogen.cc).
>
> BUG=
>
> Committed: https://crrev.com/
56600a35a49ffa5abcba66b14839089de3589ad9
> Cr-Commit-Position: refs/heads/master@{#27681}
TBR=weiliang.lin@intel.com,chunyang.dai@intel.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/
1073723002
Cr-Commit-Position: refs/heads/master@{#27682}