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If -stop is not called, then the unregistration of BooleanPrefMember from the PrefService will happen in -dealloc. This is problematic as the lifetime of the PrefBackedBoolean may be arbitrarily extended if it the last reference is "owned" by the autorelease pool. To avoid this risk, force all clients of PrefBackedBoolean to call -stop explicitly by adding a CHECK(...) in -dealloc that -stop has been called. Bug: 407023920 Change-Id: Ica8b6a3ecad334ed297bc6024b2293c73d43f5d3 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6433123 Reviewed-by: Benjamin Williams <bwwilliams@google.com> Commit-Queue: Sylvain Defresne <sdefresne@chromium.org> Cr-Commit-Position: refs/heads/main@{#1444972}
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