Version 4.3.61.22 (cherry-pick)

Merged 3c1487db

Map::ReconfigureProperty() should mark map as unstable when there is an element kind transition somewhere in the middle of the transition tree.

BUG=chromium:485548
LOG=N
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1141263005

Cr-Commit-Position: refs/branch-heads/4.3@{#26}
Cr-Branched-From: f5c0a23a-refs/heads/4.3.61@{#1}
Cr-Branched-From: 0a7d4f49-refs/heads/master@{#27508}