Implement more super calls.

test/kernel/regression/super_operator.dart

Index: test/kernel/regression/super_operator.dart
diff --git a/test/kernel/regression/bad_implicit_super_constructor.dart b/test/kernel/regression/super_operator.dart
similarity index 50%
copy from test/kernel/regression/bad_implicit_super_constructor.dart
copy to test/kernel/regression/super_operator.dart
index e5e539cdb1c57144c4bc50b083a2eadb97f09b45..05fa6cd155f768b45fb1c95dbd60e85697c95217 100644
--- a/test/kernel/regression/bad_implicit_super_constructor.dart
+++ b/test/kernel/regression/super_operator.dart
@@ -3,14 +3,21 @@
 // BSD-style license that can be found in the LICENSE.md file.
 
 class A {
-  A(this.x);
+  operator + (String s) => null;
+
+  operator [] (i) => null;
+
+  operator []= (i, val) {}
 }
 
 class B extends A {
-  const B();
+  operator + (String s) => super + ("${s}${s}");
+
+  operator [] (i) => super[i];
+
+  operator []= (i, val) => super[i++] += val;
 }
 
-main() {
-  new B();
-  const B();
+class Autobianchi {
+  g() => super[0];
 }