This changes the RestrictedTypeRules to eliminate a direct dependency on CheckerReporter. Instead of logging a missing type error with the reporter directly, it now calls an optional callback. The Checker registers an appropriate callback for its errors. Currently the code generators don't log these errors. This eliminates the dependency of the code generators on the checker reporter.
BUG=
R=jmesserly@google.com
Review URL: https://codereview.chromium.org/1067553004
Leaf Petersen
033ab827dc