cc: CompositorTimingHistory throughput UMAs
This adds the following metrics:
1) BeginMainFrameIntervalCritical:
Commit rate, aborted or not, with the critical flag set.
2) BeginMainFrameIntervalNotCritical:
Commit rate, aborted or not, without the critical flag set.
2) CommitInterval:
Draw rate of new active trees.
3) DrawInterval:
Draw rate of the compositor.
Each metric is only reported when
that stage is in a continually active
state.
BUG=477012
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/1460923002
Cr-Commit-Position: refs/heads/master@{#361743}
6 files changed