Infer the types of initializing formals from the corresponding fields.

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

 library test;
 import self as self;
 import "dart:core" as core;
 
 class C<T extends core::Object> extends core::Object {
   field self::C::T t;
-  constructor •(dynamic t) → void
+  constructor •(self::C::T t) → void
     : self::C::t = t, super core::Object::•()
     ;
 }
 static method main() → dynamic {
   dynamic x = new self::C::•<dynamic>(42);
   core::num y;
   self::C<core::int> c_int = new self::C::•<dynamic>(y);
   self::C<core::num> c_num = new self::C::•<dynamic>(123);
   dynamic c_dynamic = new self::C::•<dynamic>(42);
 }