[wip] build: enable a DCHECK in base/memory/weak_ptr.cc

[alexeykuzmin]

Description of Change

It's in the title.

Checklist

• [x] PR description included and stakeholders cc'd
• [x] script/update runs without error
• [x] PR title follows semantic commit guidelines

[alexeykuzmin]

@deepak1556 What kind of errors that DCHECKs used to cause?

[deepak1556]

There is only one incorrect usage of it left in the electron codebase https://github.com/electron/electron/blob/master/atom/browser/net/js_asker.h#L79, but that requires a refactor of that particular class to actually fix it.

[alexeykuzmin]

That DCHECK still has to be enabled, but I'm going to close the PR to reduce noise in the repo.