Include TypeEnvironment into KernelResult.

pkg/front_end/test/src/incremental/kernel_driver_test.dart

Index: pkg/front_end/test/src/incremental/kernel_driver_test.dart
diff --git a/pkg/front_end/test/src/incremental/kernel_driver_test.dart b/pkg/front_end/test/src/incremental/kernel_driver_test.dart
index 4ee2430beed8f0bf5e868f1ca9e0d17ebf5052d8..135b82b571ae49fb574edda146de6898599b87ad 100644
--- a/pkg/front_end/test/src/incremental/kernel_driver_test.dart
+++ b/pkg/front_end/test/src/incremental/kernel_driver_test.dart
@@ -274,6 +274,16 @@ static field (core::String) → core::int f;
 ''');
   }
 
+  test_compile_typeEnvironment() async {
+    writeFile('/test/.packages', 'test:lib/');
+    String aPath = '/test/lib/a.dart';
+    Uri aUri = writeFile(aPath, 'class A {}');
+
+    KernelResult result = await driver.getKernel(aUri);
+    expect(result.types.coreTypes.intClass, isNotNull);
+    expect(result.types.hierarchy, isNotNull);
+  }
+
   test_limited_ast_to_binary() async {
     writeFile('/test/.packages', 'test:lib/');
     String aPath = '/test/lib/a.dart';