core/src/com/google/inject/internal/InjectorShell.java
private static void bindLogger(InjectorImpl injector) {
    Key<Logger> key = Key.get(Logger.class);
    LoggerFactory loggerFactory = new LoggerFactory();
    injector.state.putBinding(
        key,
        new ProviderInstanceBindingImpl<Logger>(
            injector,
            key,
            SourceProvider.UNKNOWN_SOURCE,
            loggerFactory,
            Scoping.UNSCOPED,
            loggerFactory,
            ImmutableSet.<InjectionPoint>of()));
  }
private static void bindLogger(InjectorImpl injector) {
    Key<Logger> key = Key.get(Logger.class);
    LoggerFactory loggerFactory = new LoggerFactory();
    injector.state.putBinding(
        key,
        new ProviderInstanceBindingImpl<Logger>(
            injector,
            key,
            SourceProvider.UNKNOWN_SOURCE,
            loggerFactory,
            Scoping.UNSCOPED,
            loggerFactory,
            ImmutableSet.<InjectionPoint>of()));
  }
The Logger is a special case because it knows the injection point of the injected member. It's
the only binding that does this.