Eliminate multi-callback structure for LibraryLoader.

pkg/compiler/lib/src/patch_parser.dart

Index: pkg/compiler/lib/src/patch_parser.dart
diff --git a/pkg/compiler/lib/src/patch_parser.dart b/pkg/compiler/lib/src/patch_parser.dart
index 187b394e702aa9c27c53ec261e2a1fce64cd3246..50be043289e54f246e890c726d9bbc19780d849f 100644
--- a/pkg/compiler/lib/src/patch_parser.dart
+++ b/pkg/compiler/lib/src/patch_parser.dart
@@ -363,7 +363,7 @@ abstract class EagerAnnotationHandler<T> {
       T result = handler.apply(compiler, element, annotation);
       if (result != handler.defaultResult) {
         // TODO(johnniwinther): Perform this check in
-        // [Compiler.onLibrariesLoaded].
+        // [Compiler.processLoadedLibraries].
         compiler.libraryLoader
             .registerDeferredAction(new DeferredAction(element, () {
           annotation.ensureResolved(compiler.resolution);