ParentChildLayout:Toolkit Parent Child Layout Stacked

Build 128 on layouts-first-core-move
1200px
Reviewing disabled
The baseline is taller than the new snapshot (900x731 to 900x715).
Baseline History
Build 1284ca6f6c
Current build. There are unaccepted changes, so build 1 is still the baseline.
Commenting is disabled because there's a newer build on this branch