LOG=Y
BUG=v8:4124,v8:5948
R=bradnelson@chromium.org,bmeurer@chromium.org,jochen@chromium.org,hpayer@chromium.org,danno@chromium.org

Review-Url: https://codereview.chromium.org/2684313003
Cr-Original-Original-Commit-Position: refs/heads/master@{#43162}
Committed: https://chromium.googlesource.com/v8/v8/+/d170c57ab996d00c4665a9d865bd5754a1806c6c
Review-Url: https://codereview.chromium.org/2684313003
Cr-Original-Commit-Position: refs/heads/master@{#43169}
Committed: https://chromium.googlesource.com/v8/v8/+/a9b59a11f1bfe069afabe5567f919727456f1f12
Review-Url: https://codereview.chromium.org/2684313003
Cr-Commit-Position: refs/heads/master@{#43176}