The data use is not being tracked on Mac OS because of this. It shows 0 bytes used, 0 bytes saved, and no savings. See the attached screenshot from my mac machine. A user also filed a user feedback report (http://shortn/_nPyA1dw1wu).

Should we increase the priority of this?

Deleted: 7QtzaH5RN8h.png 130 KB

	7QtzaH5RN8h.png 130 KB View Download

Ok. There are a couple of memleak bugs that got fixed.
Maybe that could have stopped the crash.

I will enable data use ascriber for Mac os , and see if there is still crash.

Following are the recent bugs fixed.

https://bugs.chromium.org/p/chromium/issues/detail?id=752952
https://bugs.chromium.org/p/chromium/issues/detail?id=769627

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fc1ca454e77c23fd8f9f22b426c1c80148178055

commit fc1ca454e77c23fd8f9f22b426c1c80148178055
Author: rajendrant <rajendrant@chromium.org>
Date: Fri Oct 27 22:29:48 2017

Enable datause ascriber for Mac OS

Bug:  753559 
Change-Id: I0f085eac342552ab125844993e0ac97634ed2041
Reviewed-on: https://chromium-review.googlesource.com/739845
Commit-Queue: rajendrant <rajendrant@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512328}
[modify] https://crrev.com/fc1ca454e77c23fd8f9f22b426c1c80148178055/chrome/browser/data_use_measurement/chrome_data_use_ascriber.cc
[modify] https://crrev.com/fc1ca454e77c23fd8f9f22b426c1c80148178055/chrome/browser/data_use_measurement/chrome_data_use_ascriber_unittest.cc

Changing status to Fixed.
If Mac OS crashes are seen in canary/dev channel, this issue can be reopened.

Issue 780350 has been merged into this issue.

Is this really fixed? Can it be merged to M63? Why is this P3?

I'm assuming this is not fixed until you confirm the fix is in M63.

Crash bugs specific to Mac is being worked on.
crbug.com/781189

Raj, if this is blocked on 781189, can you please mark it so?

Changing the milestone to M-64 since the CL to enable the ascriber (in Comment 5 above) landed in 64.

Fixed in M-64.