Fix more tests under windows

pkg/analyzer/test/src/dart/sdk/sdk_test.dart

Index: pkg/analyzer/test/src/dart/sdk/sdk_test.dart
diff --git a/pkg/analyzer/test/src/dart/sdk/sdk_test.dart b/pkg/analyzer/test/src/dart/sdk/sdk_test.dart
index 164623a9e60af5bed070754a70f355effff064c3..043b3fa7375af8399fd97f7d2652f490389ccde8 100644
--- a/pkg/analyzer/test/src/dart/sdk/sdk_test.dart
+++ b/pkg/analyzer/test/src/dart/sdk/sdk_test.dart
@@ -369,16 +369,22 @@ class SdkExtensionFinderTest {
 
   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")));
   }
 }