The implementation of Object.getOwnPropertyDescriptor always called into
C++ anyway, so there's no need to have this JavaScript wrapper around at
all.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win_chromium_rel_ng
R=yangguo@chromium.org

Committed: https://crrev.com/3fdd37b028f4711d0f6dcb038f575ce08ef0cfa3
Cr-Commit-Position: refs/heads/master@{#33379}

Review URL: https://codereview.chromium.org/1606783002

Cr-Commit-Position: refs/heads/master@{#33773}