Improve error-recovery from unmatched braces.

dart/tests/compiler/dart2js/parser_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "package:expect/expect.dart";
 import 'parser_helper.dart';
 import '../../../sdk/lib/_internal/compiler/implementation/tree/tree.dart';
 
 void testStatement(String statement) {
   Node node = parseStatement(statement);
@@ skipping 258 matching lines @@
 class Collector implements DiagnosticListener {
   int token = -1;
 
   void reportFatalError(Token token,
                         messageKind,
                         [Map arguments = const {}]) {
     this.token = token.kind;
     throw this;
   }
 
+  void reportError(Token token,
+                   messageKind,
+                   [Map arguments = const {}]) {
+    reportFatalError(token, messageKind, arguments);
+  }
+
   void log(message) {
     print(message);
   }
 }
 
 void testMissingCloseParen() {
   final String source =
 '''foo(x {  // <= missing closing ")"
   return x;
 }''';
   parse() {
     parseMember(source, diagnosticHandler: new Collector());
   }
   check(Collector c) {
     Expect.equals(OPEN_CURLY_BRACKET_TOKEN, c.token);
     return true;
   }
   Expect.throws(parse, check);
 }
 
 void testMissingCloseBraceInClass() {
   final String source = 'class Foo {'; // Missing close '}'.
   parse() {
     fullParseUnit(source, diagnosticHandler: new Collector());
   }
   check(Collector c) {
-    Expect.equals(EOF_TOKEN, c.token);
+    Expect.equals(BAD_INPUT_TOKEN, c.token);
     return true;
   }
   Expect.throws(parse, check);
 }
 
 void testUnmatchedAngleBracket() {
   final String source = 'A<'; // unmatched '<'
   parse() {
     fullParseUnit(source, diagnosticHandler: new Collector());
   }
@@ skipping 15 matching lines @@
   testWhileStatement();
   testConditionalExpression();
   testAssignment();
   testIndex();
   testPostfix();
   testOperatorParse();
   testMissingCloseParen();
   testMissingCloseBraceInClass();
   testUnmatchedAngleBracket();
 }