Dan Field dedf9bd1af Reland path volatility tracker, disabling it if deterministic rendering is requested (flutter/engine#23226)
* Reland path volatility tracker (#23063)" (#23220)

This reverts commit b56fc25561417f96e17dacab375e66f474a54c94.

* allow disabling based on whether deterministic rendering is needed
2020-12-22 08:25:20 -08:00
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