Use FastaMessage instead of String. Part 1.

pkg/compiler/lib/src/parser/element_listener.dart

Index: pkg/compiler/lib/src/parser/element_listener.dart
diff --git a/pkg/compiler/lib/src/parser/element_listener.dart b/pkg/compiler/lib/src/parser/element_listener.dart
index 7e23b1e5f9b381fe2024e02a554c95a9a1df10f1..12d2881a71fc8c7b8ca13fac43f75ec96a2add86 100644
--- a/pkg/compiler/lib/src/parser/element_listener.dart
+++ b/pkg/compiler/lib/src/parser/element_listener.dart
@@ -4,7 +4,7 @@
 
 library dart2js.parser.element_listener;
 
-import 'package:front_end/src/fasta/fasta_codes.dart' show FastaMessage;
+import 'package:front_end/src/fasta/fasta_codes.dart' show Message;
 
 import 'package:front_end/src/fasta/fasta_codes.dart' as codes;
 
@@ -507,7 +507,7 @@ class ElementListener extends Listener {
   }
 
   @override
-  Token handleUnrecoverableError(Token token, FastaMessage message) {
+  Token handleUnrecoverableError(Token token, Message message) {
     Token next = handleError(token, message);
     if (next == null &&
         message.code != codes.codeUnterminatedComment &&
@@ -519,7 +519,7 @@ class ElementListener extends Listener {
   }
 
   @override
-  void handleRecoverableError(Token token, FastaMessage message) {
+  void handleRecoverableError(Token token, Message message) {
     handleError(token, message);
   }
 
@@ -538,7 +538,7 @@ class ElementListener extends Listener {
     pushNode(null);
   }
 
-  Token handleError(Token token, FastaMessage message) {
+  Token handleError(Token token, Message message) {
     MessageKind errorCode;
     Map<String, dynamic> arguments = message.arguments;
 
@@ -927,8 +927,8 @@ class ElementListener extends Listener {
     reportError(spannable, MessageKind.GENERIC, {'text': message});
     // Some parse errors are infeasible to recover from, so we throw an error.
     SourceSpan span = reporter.spanFromSpannable(spannable);
-    throw new ParserError(span.begin, span.end,
-        codes.codeUnspecified.format(uri, span.begin, message));
+    throw new ParserError(
+        span.begin, span.end, codes.templateUnspecified.withArguments(message));
   }
 
   void reportError(Spannable spannable, MessageKind errorCode,