The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4abfe94b81096ee4c806240b0ea5e2c03bfe4b65

commit 4abfe94b81096ee4c806240b0ea5e2c03bfe4b65
Author: erikchen <erikchen@chromium.org>
Date: Thu May 11 23:05:49 2017

Add experimental private memory footprint metrics for macOS.

These metrics are temporary and are intended to be removed once the same metrics
are emitted by the memory instrumentation service.

BUG=720541

Review-Url: https://codereview.chromium.org/2875823004
Cr-Commit-Position: refs/heads/master@{#471107}

[modify] https://crrev.com/4abfe94b81096ee4c806240b0ea5e2c03bfe4b65/chrome/browser/memory_details.cc
[modify] https://crrev.com/4abfe94b81096ee4c806240b0ea5e2c03bfe4b65/chrome/browser/memory_details.h
[modify] https://crrev.com/4abfe94b81096ee4c806240b0ea5e2c03bfe4b65/chrome/browser/memory_details_mac.cc
[modify] https://crrev.com/4abfe94b81096ee4c806240b0ea5e2c03bfe4b65/chrome/browser/metrics/metrics_memory_details.cc
[modify] https://crrev.com/4abfe94b81096ee4c806240b0ea5e2c03bfe4b65/tools/metrics/histograms/histograms.xml

Do we still need this metric?

https://chromium-review.googlesource.com/c/chromium/src/+/837656

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8f7bf1829627fc0e4be6c6be17517a9eee32eb12

commit 8f7bf1829627fc0e4be6c6be17517a9eee32eb12
Author: Erik Chen <erikchen@chromium.org>
Date: Wed Jan 03 19:13:12 2018

Remove temporary estimates for private memory footprint

The equivalent metrics are now uploaded by ProcessMemoryMetricsEmitter, except
for all platforms rather than just macOS.

Bug: 720541
Change-Id: I36ed3a888bb0021744e12df84587c796cfd80865
Reviewed-on: https://chromium-review.googlesource.com/837656
Commit-Queue: Erik Chen <erikchen@chromium.org>
Reviewed-by: Siddhartha S <ssid@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526759}
[modify] https://crrev.com/8f7bf1829627fc0e4be6c6be17517a9eee32eb12/chrome/browser/memory_details.cc
[modify] https://crrev.com/8f7bf1829627fc0e4be6c6be17517a9eee32eb12/chrome/browser/memory_details.h
[modify] https://crrev.com/8f7bf1829627fc0e4be6c6be17517a9eee32eb12/chrome/browser/memory_details_mac.cc
[modify] https://crrev.com/8f7bf1829627fc0e4be6c6be17517a9eee32eb12/chrome/browser/metrics/metrics_memory_details.cc
[modify] https://crrev.com/8f7bf1829627fc0e4be6c6be17517a9eee32eb12/tools/metrics/histograms/histograms.xml