Fix PathFilter constructor to be backward compatible with analyzer 0.26.0.

pkg/analyzer/test/source/path_filter_test.dart

Index: pkg/analyzer/test/source/path_filter_test.dart
diff --git a/pkg/analyzer/test/source/path_filter_test.dart b/pkg/analyzer/test/source/path_filter_test.dart
index 845eb4753a24742cb7abf9fba8096fa9791ef59d..15a30e7bd1504af7c31b71829065cd34b5166258 100644
--- a/pkg/analyzer/test/source/path_filter_test.dart
+++ b/pkg/analyzer/test/source/path_filter_test.dart
@@ -16,37 +16,37 @@ main() {
     setUp(() {});
     tearDown(() {});
     test('test_ignoreEverything', () {
-      var filter = new PathFilter(context, '/', ['*']);
+      var filter = new PathFilter('/', ['*'], context);
       expect(filter.ignored('a'), isTrue);
     });
     test('test_ignoreFile', () {
-      var filter = new PathFilter(context, '/', ['apple']);
+      var filter = new PathFilter('/', ['apple'], context);
       expect(filter.ignored('apple'), isTrue);
       expect(filter.ignored('banana'), isFalse);
     });
     test('test_ignoreMultipleFiles', () {
-      var filter = new PathFilter(context, '/', ['apple', 'banana']);
+      var filter = new PathFilter('/', ['apple', 'banana'], context);
       expect(filter.ignored('apple'), isTrue);
       expect(filter.ignored('banana'), isTrue);
     });
     test('test_ignoreSubDir', () {
-      var filter = new PathFilter(context, '/', ['apple/*']);
+      var filter = new PathFilter('/', ['apple/*'], context);
       expect(filter.ignored('apple/banana'), isTrue);
       expect(filter.ignored('apple/banana/cantaloupe'), isFalse);
     });
     test('test_ignoreTree', () {
-      var filter = new PathFilter(context, '/', ['apple/**']);
+      var filter = new PathFilter('/', ['apple/**'], context);
       expect(filter.ignored('apple/banana'), isTrue);
       expect(filter.ignored('apple/banana/cantaloupe'), isTrue);
     });
     test('test_ignoreSdkExt', () {
-      var filter = new PathFilter(context, '/', ['sdk_ext/**']);
+      var filter = new PathFilter('/', ['sdk_ext/**'], context);
       expect(filter.ignored('sdk_ext/entry.dart'), isTrue);
       expect(filter.ignored('sdk_ext/lib/src/part.dart'), isTrue);
     });
     test('test_outsideRoot', () {
       var filter =
-          new PathFilter(context, '/workspace/dart/sdk', ['sdk_ext/**']);
+          new PathFilter('/workspace/dart/sdk', ['sdk_ext/**'], context);
       expect(filter.ignored('/'), isTrue);
       expect(filter.ignored('/workspace'), isTrue);
       expect(filter.ignored('/workspace/dart'), isTrue);
@@ -55,7 +55,7 @@ main() {
     });
     test('test_relativePaths', () {
       var filter =
-          new PathFilter(context, '/workspace/dart/sdk', ['sdk_ext/**']);
+          new PathFilter('/workspace/dart/sdk', ['sdk_ext/**'], context);
       expect(filter.ignored('../apple'), isTrue);
       expect(filter.ignored('../sdk/main.dart'), isFalse);
       expect(filter.ignored('../sdk/sdk_ext/entry.dart'), isTrue);