DynamicSlowMPU:with two bigs

Build 9538 on ab/trail-redesign
320px
Reviewing disabled
The baseline is shorter than the new snapshot (320x1198 to 320x1202).
Baseline History
Build 953872422c5
Current build. There are unaccepted changes, so build 8999 is still the baseline.
Build 899944ad57d current baseline
Accepted by Charlotte Emms.
Build 8944f4a77bb
Accepted by Charlotte Emms.
Build 8890a8022d1
Accepted by Anna Beddow.
Build 8533274c941
Accepted by Charlotte Emms.
Commenting is disabled because there's a newer build on this branch