DynamicSlowMPU:Ad-free with lots of bigs

Build 9870 on ab/headline-size-refactor-2
320px
Reviewing disabled
The baseline is shorter than the new snapshot (320x1067 to 320x1111).
Baseline History
Build 98701590f92
Current build. There are unaccepted changes, so build 8944 is still the baseline.
Build 8944f4a77bb current baseline
Accepted by Charlotte Emms.
Build 8890a8022d1
Accepted by Anna Beddow.
Build 85630ab8c8a
Accepted by Max Duval.
Build 84226c7620e
Accepted by Charlotte Emms.
Commenting is disabled because there's a newer build on this branch