Version 4.2.77.21 (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
LOG=N
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1156323004

Cr-Commit-Position: refs/branch-heads/4.2@{#24}
Cr-Branched-From: 3dfd929e-refs/heads/4.2.77@{#2}
Cr-Branched-From: e0110920-refs/heads/master@{#26757}