Version 4.3.61.24 (cherry-pick)

Merged 7c347c54
Merged 4922412a
Merged eda4b5bc

Ensure object literal element boilerplates aren't modified.

PPC: Ensure object literal element boilerplates aren't modified.

MIPS64: Ensure object literal element boilerplates aren't modified.

BUG=466993,466993
LOG=N
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1162603002

Cr-Commit-Position: refs/branch-heads/4.3@{#29}
Cr-Branched-From: f5c0a23a-refs/heads/4.3.61@{#1}
Cr-Branched-From: 0a7d4f49-refs/heads/master@{#27508}