Resolve URIs of parts of imported libraries relative to importing library sources.

pkg/analyzer/test/src/summary/resynthesize_ast_test.dart

Index: pkg/analyzer/test/src/summary/resynthesize_ast_test.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_ast_test.dart b/pkg/analyzer/test/src/summary/resynthesize_ast_test.dart
index fdef58651491878220574ed8234ebc074428cd3a..d92bff19c6f51cd3347273de48ba26ac8ff45d99 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_ast_test.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_ast_test.dart
@@ -612,12 +612,6 @@ class ResynthesizeAstTest extends ResynthesizeTest
   void test_inferred_function_type_in_generic_class_constructor() {
     super.test_inferred_function_type_in_generic_class_constructor();
   }
-
-  @override
-  @failingTest
-  void test_type_reference_to_import_part_in_subdir() {
-    super.test_type_reference_to_import_part_in_subdir();
-  }
 }
 
 /**