Add subtype matching rules for function types.

pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart.strong.expect

Index: pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart.strong.expect
diff --git a/pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart.strong.expect b/pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart.strong.expect
new file mode 100644
index 0000000000000000000000000000000000000000..cff018347a2732268033647960855be7d27df31a
--- /dev/null
+++ b/pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart.strong.expect
@@ -0,0 +1,25 @@
+library test;
+import self as self;
+import "dart:core" as core;
+
+typedef F = <T extends core::Object>() → T;
+class A extends core::Object {
+  constructor •() → void
+    : super core::Object::•()
+    ;
+}
+class C<T extends self::A> extends core::Object {
+  constructor •(() → self::C::T f) → void
+    : super core::Object::•()
+    ;
+}
+class NotA extends core::Object {
+  constructor •() → void
+    : super core::Object::•()
+    ;
+}
+static method myF() → self::NotA
+  return null;
+static method main() → dynamic {
+  self::C<self::NotA> x = new self::C::•<self::NotA>(self::myF);
+}