Fix more tests under windows

pkg/analyzer/test/src/dart/sdk/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/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/context/builder.dart' show EmbedderYamlLocator;
 import 'package:analyzer/src/dart/sdk/sdk.dart';
@@ skipping 351 matching lines @@
     expect(resolver.urlMappings.length, equals(0));
   }
 
   test_create_nullPackageMap() {
     var resolver = new SdkExtensionFinder(null);
     expect(resolver.urlMappings.length, equals(0));
   }
 
   test_create_sdkExtPackageMap() {
     var resolver = new SdkExtensionFinder({
-      'fox': <Folder>[resourceProvider.getResource('/tmp')]
+      'fox': <Folder>[
+        resourceProvider.getResource(resourceProvider.convertPath('/tmp'))
+      ]
     });
     // We have four mappings.
     Map<String, String> urlMappings = resolver.urlMappings;
     expect(urlMappings.length, equals(4));
     // Check that they map to the correct paths.
-    expect(urlMappings['dart:fox'], equals("/tmp/slippy.dart"));
-    expect(urlMappings['dart:bear'], equals("/tmp/grizzly.dart"));
-    expect(urlMappings['dart:relative'], equals("/relative.dart"));
-    expect(urlMappings['dart:deep'], equals("/tmp/deep/directory/file.dart"));
+    expect(urlMappings['dart:fox'],
+        equals(resourceProvider.convertPath("/tmp/slippy.dart")));
+    expect(urlMappings['dart:bear'],
+        equals(resourceProvider.convertPath("/tmp/grizzly.dart")));
+    expect(urlMappings['dart:relative'],
+        equals(resourceProvider.convertPath("/relative.dart")));
+    expect(urlMappings['dart:deep'],
+        equals(resourceProvider.convertPath("/tmp/deep/directory/file.dart")));
   }
 }
 
 @reflectiveTest
 class SDKLibrariesReaderTest extends EngineTestCase {
   /**
    * The resource provider used by these tests.
    */
   MemoryResourceProvider resourceProvider;
 
@@ skipping 67 matching lines @@
     expect(second, isNotNull);
     expect(second.category, "Server");
     expect(second.path, "second/second.dart");
     expect(second.shortName, "dart:second");
     expect(second.isDart2JsLibrary, false);
     expect(second.isDocumented, false);
     expect(second.isImplementation, true);
     expect(second.isVmLibrary, false);
   }
 }