Implement type inference for super initializers.

pkg/front_end/testcases/inference/super_initializer.dart.direct.expect

Index: pkg/front_end/testcases/inference/super_initializer.dart.direct.expect
diff --git a/pkg/front_end/testcases/inference/super_initializer.dart.direct.expect b/pkg/front_end/testcases/inference/super_initializer.dart.direct.expect
new file mode 100644
index 0000000000000000000000000000000000000000..1d9a2bf0e44da1b7ff7594c4b0e6328a5a5dea46
--- /dev/null
+++ b/pkg/front_end/testcases/inference/super_initializer.dart.direct.expect
@@ -0,0 +1,17 @@
+library test;
+import self as self;
+import "dart:core" as core;
+
+class C extends self::B {
+  constructor •() → void
+    : super self::B::•(self::f<dynamic>())
+    ;
+}
+class B extends core::Object {
+  constructor •(core::int x) → void
+    : super core::Object::•()
+    ;
+}
+static method f<T extends core::Object>() → self::f::T
+  return null;
+static method main() → dynamic {}