GitLab

Restructure memory dump metrics to avoid double counting memory.

Affected metrics:
  Memory.Experimental.Gpu2.Small.ServiceTransferCache
  Memory.Experimental.Gpu2.Small.ServiceTransferCache.AvgImageSize
  Memory.Experimental.Gpu2.Small.ServiceDiscardableManager
  Memory.Experimental.Gpu2.Small.ServiceDiscardableManager.AvgImageSize

Bug: 963619
Change-Id: Ia1ae23ce99d351807eb1e3f9727882ec2257a153
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1888095Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: ssid <ssid@chromium.org>
Reviewed-by: Eric Karl <ericrk@chromium.org>
Commit-Queue: Sasha McIntosh <sashamcintosh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#711024}