Baseline: 1d335316e755216808791bdfbdcc448fc68141dc

Cherry picks:

   + 642b571962ca9e6cf40ce94a8f53b8618f12080a:
     Disable SkyframeStats collection unless specifically requested
     by flag. Removes the logic to limit on the number of reported
     types, if you're requesting the stats already you just get all
     of them.

This release contains contributions from many people at Google, as well as Benjamin Peterson.