Add a toUri method to Resource

pkg/analyzer/test/file_system/memory_file_system_test.dart

Index: pkg/analyzer/test/file_system/memory_file_system_test.dart
diff --git a/pkg/analyzer/test/file_system/memory_file_system_test.dart b/pkg/analyzer/test/file_system/memory_file_system_test.dart
index 2787ce2ca08736402270f17ca580a2c76e1305a7..5c931b144489e8ba1ae3bcb187f4b4fd9d9d3159 100644
--- a/pkg/analyzer/test/file_system/memory_file_system_test.dart
+++ b/pkg/analyzer/test/file_system/memory_file_system_test.dart
@@ -204,6 +204,12 @@ class FileTest {
     expect(file.toString(), '/foo/bar/file.txt');
   }
 
+  void test_toUri() {
+    String path = '/foo/file.txt';
+    File file = provider.newFile(path, '');
+    expect(file.toUri(), new Uri.file(path, windows: false));
+  }
+
   void test_writeAsBytesSync_existing() {
     File file = provider.newFileWithBytes('/foo/file.bin', <int>[1, 2]);
     expect(file.readAsBytesSync(), <int>[1, 2]);
@@ -387,6 +393,12 @@ class FolderTest {
     expect(parent2.path, equals('/'));
     expect(parent2.parent, isNull);
   }
+
+  void test_toUri() {
+    String path = '/foo/directory';
+    Folder folder = provider.newFolder(path);
+    expect(folder.toUri(), new Uri.directory(path, windows: false));
+  }
 }
 
 @reflectiveTest
@@ -539,6 +551,13 @@ class MemoryResourceProviderTest {
     expect(file.exists, isFalse);
   }
 
+  test_getModificationTimes() async {
+    File file = provider.newFile('/test.dart', '');
+    Source source = file.createSource();
+    List<int> times = await provider.getModificationTimes([source]);
+    expect(times, [source.modificationStamp]);
+  }
+
   void test_getStateLocation_uniqueness() {
     String idOne = 'one';
     Folder folderOne = provider.getStateLocation(idOne);
@@ -615,13 +634,6 @@ class MemoryResourceProviderTest {
     }, throwsA(new isInstanceOf<ArgumentError>()));
   }
 
-  test_getModificationTimes() async {
-    File file = provider.newFile('/test.dart', '');
-    Source source = file.createSource();
-    List<int> times = await provider.getModificationTimes([source]);
-    expect(times, [source.modificationStamp]);
-  }
-
   test_watch_createFile() {
     String rootPath = '/my/path';
     provider.newFolder(rootPath);