liyuqian 67b5bdf99b
Reland "Measure iOS CPU/GPU percentage (#41234)" (#41426)
This reverts commit f1e7fe8142a0b75da74617bec617589882a730a7.

This fix is in https://github.com/flutter/packages/pull/39
2019-09-28 14:24:46 -07:00
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