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We have kFrameSequenceTrackerTypeNames defined in the
compositor_frame_reporter.cc and kBuiltinSequences defined in the
frame_sequence_tracker.cc, where these two essential represents the same
thing. This is problematic, that when we add an entry in one place, the
other place must be adding that entry too.

This CL defines kFrameSequenceTrackerTypeNames as static in the
CompositorFrameReporter class and then FrameSequenceTracker can just
use it.

No behavior change should be introduced.

Bug: None
Change-Id: I0dc9e40be82d147615e1aa61afb1a7d8750390e8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1774831
Commit-Queue: Xida Chen <xidachen@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#692053}