Version 3.31.26 (based on 61c861998e9f1b9c0c74a2bd6930340cc95a4316)

Abort optimization in corner case (Chromium issue 436893).

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/candidates@{#25300}
Version 3.31.27 (based on b56afa23e354a86d108001800278105adbbf0a64)

Ship harmony-strings.

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/candidates@{#25301}