The Object.freeze, Object.isExtensible, Object.isFrozen,
Object.isSealed, Object.preventExtensions and Object.seal builtins were
already implemented in C++, but they still had some funny JavaScript
wrappers that just called into the C++ implementation on every
(interesting) execution path.

Review URL: https://codereview.chromium.org/1553043002

Cr-Commit-Position: refs/heads/master@{#33074}