Restructure parser error handling and recovery.

pkg/fasta/lib/src/source/stack_listener.dart

Index: pkg/fasta/lib/src/source/stack_listener.dart
diff --git a/pkg/fasta/lib/src/source/stack_listener.dart b/pkg/fasta/lib/src/source/stack_listener.dart
index 8676854eac6398b22e6526110f659e028aa60a8d..54ac0f2a01e79748dfccdba75bf85f7355cb4811 100644
--- a/pkg/fasta/lib/src/source/stack_listener.dart
+++ b/pkg/fasta/lib/src/source/stack_listener.dart
@@ -8,6 +8,7 @@ import 'dart:collection' show
     Queue;
 
 import 'package:dart_parser/dart_parser.dart' show
+    ErrorKind,
     Listener;
 
 import 'package:dart_scanner/dart_scanner.dart' show
@@ -226,7 +227,8 @@ abstract class StackListener extends Listener {
   }
 
   @override
-  void error(String message, Token token) {
-    inputError(uri, token.charOffset, message);
+  void handleRecoverableError(Token token, ErrorKind kind, Map arguments) {
+    super.handleRecoverableError(token, kind, arguments);
+    debugEvent("Error: ${recoverableErrors.last}");
   }
 }