Handle super calls in the backend type inferrer.

tests/language/super_inferrer_test.dart

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Test that dart2js's backend type inference handles super calls.
+
+import "package:expect/expect.dart";
+
+class A {
+  foo(a) => a + 42;
+}
+
+class B extends A {
+  bar() {
+    super.foo(null);
+  }
+}
+
+var a = [new A()];
+
+main() {
+  analyzeFirst();
+  analyzeSecond();
+}
+
+analyzeFirst() {
+  Expect.equals(84, a[0].foo(42));
+}
+
+analyzeSecond() {
+  Expect.throws(() => new B().bar(), (e) => e is NoSuchMethodError);
+}