GitLab

Store a stacktrace of PrefService destruction in PrefChangeRegistrar to debug a
race condition: ~PrefChangeRegistrar causes a crash. The current hypothesis is
that this is caused because the PrefChangeRegistrar is registered to a Profile
that is already destroyed. This code stores stacktrace when the Profile's
PrefService is destroyed to see whether this is correct.

BUG=373435

Review URL: https://codereview.chromium.org/290083006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@271416 0039d316-1c4b-4281-b951-d872f2087c98