tree f1cb2c58aa8a2468878292cf7cd43eefbaca88e4
parent 133e5e75263be696c06599ab97614a1e1e6d9c66
author Thomas Van Lenten <thomasvl@google.com> 1613743847 -0500
committer Thomas Van Lenten <thomasvl@google.com> 1614017312 -0500

Move the class map to a CFDictionary.

Since the keys are `Class`-s, there's no need to hash/copy/etc. them. This
avoids causing `+initialize` on the classes just when building up a registry.