Replace and remove JavaException(s).

pkg/analyzer/test/generated/source_factory_test.dart

 // Copyright (c) 2015, 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.
 
 library analyzer.test.generated.test.generated.source_factory;
 
 import 'dart:convert';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
@@ skipping 221 matching lines @@
 @reflectiveTest
 class SourceFactoryTest {
   MemoryResourceProvider resourceProvider = new MemoryResourceProvider();
 
   void test_creation() {
     expect(new SourceFactory([]), isNotNull);
   }
 
   void test_fromEncoding_invalidUri() {
     SourceFactory factory = new SourceFactory([]);
-    expect(() => factory.fromEncoding("<:&%>"),
-        throwsA(new isInstanceOf<IllegalArgumentException>()));
+    expect(() => factory.fromEncoding("<:&%>"), throwsArgumentError);
   }
 
   void test_fromEncoding_noResolver() {
     SourceFactory factory = new SourceFactory([]);
     expect(() => factory.fromEncoding("foo:/does/not/exist.dart"),
-        throwsA(new isInstanceOf<IllegalArgumentException>()));
+        throwsArgumentError);
   }
 
   void test_fromEncoding_valid() {
     String encoding = "file:///does/not/exist.dart";
     SourceFactory factory = new SourceFactory(
         [new UriResolver_SourceFactoryTest_test_fromEncoding_valid(encoding)]);
     expect(factory.fromEncoding(encoding), isNotNull);
   }
 
   void test_resolveUri_absolute() {
@@ skipping 101 matching lines @@
   UriResolver_SourceFactoryTest_test_fromEncoding_valid(this.encoding);
 
   @override
   Source resolveAbsolute(Uri uri, [Uri actualUri]) {
     if (uri.toString() == encoding) {
       return new TestSource();
     }
     return null;
   }
 }