Version 4.3.61.25 (cherry-pick)

Merged 7b242193

Fix lookup iterator checks in GetRealNamedProperty* methods

BUG=v8:4143
LOG=N
TBR=hablich@chromium.org

Review URL: https://codereview.chromium.org/1162603003

Cr-Commit-Position: refs/branch-heads/4.3@{#30}
Cr-Branched-From: f5c0a23a-refs/heads/4.3.61@{#1}
Cr-Branched-From: 0a7d4f49-refs/heads/master@{#27508}