Support for a.b.c.d extract property sequence.

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 5e2bcd6adc92ffcb88ac8fff3ee9a06ca722bbae..1d001ed95b9a183ba6f3f6b472c452df8b1dace1 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_ast_test.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_ast_test.dart
@@ -245,6 +245,23 @@ var d = foo.bar;
   ''');
   }
 
+  void test_infer_extractProperty_getter_sequence() {
+    var unit = checkFile(r'''
+class A {
+  B b = new B();
+}
+class B {
+  C c = new C();
+}
+class C {
+  int d;
+}
+var a = new A();
+var v = a.b.c.d;
+  ''');
+    expect(unit.topLevelVariables[1].type.toString(), 'int');
+  }
+
   void test_infer_extractProperty_method() {
     checkFile(r'''
 var a = 1.round;