Add support for converted closures with explicit contexts to VM

pkg/kernel/testcases/closures/for_in_closure.dart.expect

Index: pkg/kernel/testcases/closures/for_in_closure.dart.expect
diff --git a/pkg/kernel/testcases/closures/for_in_closure.dart.expect b/pkg/kernel/testcases/closures/for_in_closure.dart.expect
index 85014e9a7e8e509b98b24e899ab41afe9e321035..fc7afb1187c5671ccd76fc28aab393d592d8c067 100644
--- a/pkg/kernel/testcases/closures/for_in_closure.dart.expect
+++ b/pkg/kernel/testcases/closures/for_in_closure.dart.expect
@@ -9,7 +9,7 @@ static method main() → dynamic {
     final Vector #context = MakeVector(2);
     #context[1] = i;
     {
-      closures.add(MakeClosure<() → core::int>(self::closure#main#function, #context));
+      closures.add(MakeClosure<() → dynamic>(self::closure#main#function, #context));
     }
   }
   core::int sum = 0;
@@ -21,6 +21,6 @@ static method main() → dynamic {
     throw core::Exception::•("Unexpected sum = ${sum} != ${expectedSum}");
   }
 }
-static method closure#main#function(Vector #contextParameter) → core::int {
+static method closure#main#function(Vector #contextParameter) → dynamic {
   return #contextParameter[1];
 }