This CL is part of the investigation into replacing
DroppedFrameCounter UKMs with FrameSequenceMetrics.
Details about DFC metrics and why they are redundant
can be found in go/chrome-cc-metrics-refactor.
New Metric Doc: go/chrome-graphics-fsm-as-ukm
Why is this CL so complicated? Approach explained
here: go/chrome-cc-pdf4-as-ukm-why
Bug: 338977417, 395868899
Change-Id: I2a4f222088881f8e58b61b6d55144f91466f808a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6187722
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Ian Clelland <iclelland@chromium.org>
Reviewed-by: Jonathan Ross <jonross@chromium.org>
Commit-Queue: Stacy Gaikovaia <gaiko@google.com>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1422117}
b3deb703f9