GitLab

As part of adding histograms, it seems that the preferred way to emit
enum histograms is with a kMaxValue sentinel and let the enum macro
detect that. All of the scheduler and user classifier histograms were
converted from SHOUTY_CASE to kCamelCase to facilitate a kMaxValue.

Bug: 831648
Change-Id: Ib24791fdb7bcafcfeb6cf754736fe6ba7298c7d7
Reviewed-on: https://chromium-review.googlesource.com/1133687
Commit-Queue: Sky Malice <skym@chromium.org>
Reviewed-by: Gang Wu <gangwu@chromium.org>
Reviewed-by: Filip Gorski <fgorski@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576240}