Make analyzer strong-mode clean

pkg/analyzer/test/generated/sdk_test.dart

 // Copyright (c) 2014, 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.sdk_test;
 
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 48 matching lines @@
     DartSdk result = manager.getSdk(description, () => sdk);
     expect(result, same(sdk));
     manager.getSdk(description, _failIfAbsent);
   }
 
   DartSdk _failIfAbsent() {
     fail('Use of ifAbsent function');
     return null;
   }
 
-  DartSdk _failIfCreated(_) {
+  DartSdk _failIfCreated(AnalysisOptions _) {
     fail('Use of sdkCreator');
     return null;
   }
 }
 
 @reflectiveTest
 class SdkDescriptionTest extends EngineTestCase {
   void test_equals_differentPaths_nested() {
     AnalysisOptions options = new AnalysisOptionsImpl();
     SdkDescription left = new SdkDescription(<String>['/a/b/c'], options);
@@ skipping 37 matching lines @@
   }
 
   void test_equals_samePaths_sameOptions_single() {
     String path = '/a/b/c';
     AnalysisOptions options = new AnalysisOptionsImpl();
     SdkDescription left = new SdkDescription(<String>[path], options);
     SdkDescription right = new SdkDescription(<String>[path], options);
     expect(left == right, isTrue);
   }
 }