This reverts commit 3877bf6f.

Reason for revert: failed compilation on Win64/clang:

https://build.chromium.org/p/client.v8/builders/V8%20Win64%20-%20clang/builds/9015

Original change's description:
> Snapshot: support rehashing property and element dictionaries.
> 
> This change
> - adds new maps for elements, global, and named dictionaries.
> - adds support to embed these dictionaries in the startup snapshot.
> - adds support to embed these dictionaries in the code cache.
> - refactors the rehashing logic.
> 
> R=​ishell@chromium.org, jgruber@chromium.org, mstarzinger@chromium.org
> 
> Bug: v8:6593
> Change-Id: I8d9a7ba7145f1af4e6e15301a4d5611f07c77f33
> Reviewed-on: https://chromium-review.googlesource.com/753323
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Commit-Queue: Yang Guo <yangguo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49155}

TBR=yangguo@chromium.org,mstarzinger@chromium.org,jgruber@chromium.org,ishell@chromium.org

Change-Id: I0b45d2d07da97b9a7953abf4ad24eec4ea944306
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6593
Reviewed-on: https://chromium-review.googlesource.com/755493Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49156}