Add tests for list and async marker

pkg/compiler/lib/src/inferrer/builder_kernel.dart

Index: pkg/compiler/lib/src/inferrer/builder_kernel.dart
diff --git a/pkg/compiler/lib/src/inferrer/builder_kernel.dart b/pkg/compiler/lib/src/inferrer/builder_kernel.dart
index 5250e4b57d3027bfb9fc637a237b641038a3baac..a539d42ad9a8f5eff3edc84b8e39636e6d4a7d77 100644
--- a/pkg/compiler/lib/src/inferrer/builder_kernel.dart
+++ b/pkg/compiler/lib/src/inferrer/builder_kernel.dart
@@ -182,8 +182,6 @@ class KernelTypeGraphBuilder extends ir.Visitor<TypeInformation> {
           : types.simplifyPhi(null, null, elementType);
       TypeInformation containerType =
           listLiteral.isConst ? types.constListType : types.growableListType;
-      // TODO(efortuna): Change signature of allocateList and the rest of
-      // type_system to deal with Kernel elements.
       return types.allocateList(
           containerType, listLiteral, analyzedMember, elementType, length);
     });