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This CL does not affect any behavior.

By adding traces, debugging events of jankiness becomes simpler and it
allows to figure out which steps that rely on cached data slow down
once the caching is reduced.

Bug: None
Change-Id: I2771e85038fd215067bb2a9aa6a2750e80e842c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2633266Reviewed-by: Matthias Körber <koerber@google.com>
Commit-Queue: Friedrich [CET] <fhorschig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844485}