If an extension function doesn't have permission to execute, it will DCHECK when the function is destructed [1].

Instead, we should modify the DCHECK to account for this case because it is possible that an extension function doesn't have permission to execute and then it is destroyed.

[1] https://chromium.googlesource.com/chromium/src/+/444f4f500b376fd1d64553c2e655bdf6a5afaf68/extensions/browser/extension_function.cc#504