Resynthesize constructor initializers from Kernel.

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

Index: pkg/analyzer/test/src/summary/resynthesize_common.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_common.dart b/pkg/analyzer/test/src/summary/resynthesize_common.dart
index 2c8617a31838aed70c625d5e5d7506e9f0e1210b..79747689a78b76a972b8f2113b90c0911e8f601c 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_common.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_common.dart
@@ -4331,7 +4331,7 @@ class C {
     var library = await checkLibrary('''
 class C {
   final x;
-  const A() : x = foo();
+  const C() : x = foo();
 }
 int foo() => 42;
 ''', allowErrors: true);
@@ -4383,6 +4383,26 @@ class C extends A {
 ''');
   }
 
+  test_constructor_initializers_superInvocation_named_underscore() async {
+    var library = await checkLibrary('''
+class A {
+  const A._();
+}
+class B extends A {
+  const B() : super._();
+}
+''');
+    checkElementText(library, r'''
+class A {
+  const A._();
+}
+class B extends A {
+  const B() : super.
+        _/*location: test.dart;A;_*/();
+}
+''');
+  }
+
   test_constructor_initializers_superInvocation_namedExpression() async {
     var library = await checkLibrary('''
 class A {
@@ -4879,7 +4899,24 @@ class D {
   D() : x = new C();
 }
 ''');
-    checkElementText(library, r'''
+    if (isSharedFrontEnd) {
+      // The shared front-end keeps initializers for cycled constructors.
+      checkElementText(library, r'''
+class C {
+  final dynamic x;
+  C() :
+        x/*location: test.dart;C;x*/ = new
+        D/*location: test.dart;D*/();
+}
+class D {
+  final dynamic x;
+  D() :
+        x/*location: test.dart;D;x*/ = new
+        C/*location: test.dart;C*/();
+}
+''');
+    } else {
+      checkElementText(library, r'''
 class C {
   final dynamic x;
   C();
@@ -4889,6 +4926,7 @@ class D {
   D();
 }
 ''');
+    }
   }
 
   test_defaultValue_refersToGenericClass_constructor() async {