Jonah Williams ff1fc77532 [Impeller] Add GPU frame time to Vulkan backend using timestamp queries. (flutter/engine#46796)
For https://github.com/flutter/flutter/pull/136408 ,

Approximate the GPU frame time by measuring the difference between a timestamp query recorded at the beginning of the frame and a timestamp query recorded at the end of the frame.
2023-10-13 22:05:00 +00:00
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