DynamicSlowMPU:Ad-free with 2 bigs & 3 standards

Build 9877 on ab/headline-size-refactor-2
320px
Reviewing disabled
The baseline is shorter than the new snapshot (320x952 to 320x989).
Baseline History
Build 9877802f790 current baseline
Current build. Accepted by Anna Beddow.
Build 98701590f92
Ancestor build. There were unaccepted changes, so this was not used as a baseline.
Build 9821651c255
Inherited baseline identical to build 9621
Build 96212e7a910
Accepted by Charlotte Emms.
Build 9571db42b81
Accepted by Anna Beddow.
Build 956153b80bb
Accepted by Charlotte Emms.
Build 9540d2ef66e
Accepted by Anna Beddow.
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