Extract DiagnosticReporter implementation from Compiler.

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 'package:compiler/src/tree/tree.dart';
 
 void testStatement(String statement) {
   Node node = parseStatement(statement);
@@ skipping 274 matching lines @@
   FunctionExpression function = parseMember('operator -() => null;');
   Send name = function.name.asSend();
   Expect.isNotNull(name);
   Expect.stringEquals('operator', name.receiver.toString());
   Expect.stringEquals('-', name.selector.toString());
   Expect.isTrue(function.parameters.isEmpty);
   Expect.isNull(function.returnType);
   Expect.isNull(function.getOrSet);
 }
 
-class Collector extends DiagnosticListener {
+class Collector extends DiagnosticReporter {
   int token = -1;
 
   void reportFatalError(Token token) {
     this.token = token.kind;
     throw this;
   }
 
   void reportError(
       DiagnosticMessage message,
       [List<DiagnosticMessage> infos = const <DiagnosticMessage>[]]) {
@@ skipping 13 matching lines @@
     return new DiagnosticMessage(null, spannable, null);
   }
 }
 
 void testMissingCloseParen() {
   final String source =
 '''foo(x {  // <= missing closing ")"
   return x;
 }''';
   parse() {
-    parseMember(source, diagnosticHandler: new Collector());
+    parseMember(source, reporter: 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());
+    fullParseUnit(source, reporter: new Collector());
   }
   check(Collector c) {
     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());
+    fullParseUnit(source, reporter: new Collector());
   }
   check(Collector c) {
     Expect.equals(LT_TOKEN, c.token);
     return true;
   }
   Expect.throws(parse, check);
 }
 
 void main() {
   testGenericTypes();
   // TODO(ahe): Enable this test when we handle library prefixes.
   // testPrefixedGenericTypes();
   testUnaryExpression();
   testChainedMethodCalls();
   testFunctionStatement();
   testDoStatement();
   testWhileStatement();
   testConditionalExpression();
   testNullOperators();
   testAssignment();
   testIndex();
   testPostfix();
   testOperatorParse();
   testMissingCloseParen();
   testMissingCloseBraceInClass();
   testUnmatchedAngleBracket();
 }