Even less reliance on Compiler.closedWorld

pkg/compiler/lib/src/core_types.dart

Index: pkg/compiler/lib/src/core_types.dart
diff --git a/pkg/compiler/lib/src/core_types.dart b/pkg/compiler/lib/src/core_types.dart
index ea201f9ec784644d4018ac2b458dbc4d5e8e0a64..aff5fd9b17a28586846092efb88ace4eba9bc4b7 100644
--- a/pkg/compiler/lib/src/core_types.dart
+++ b/pkg/compiler/lib/src/core_types.dart
@@ -130,6 +130,12 @@ abstract class CommonElements extends CoreClasses {
   /// Whether [element] is the same as [functionApplyMethod]. This will not
   /// resolve the apply method if it hasn't been seen yet during compilation.
   bool isFunctionApplyMethod(Element element);
+
+  /// The unnamed constructor of `List`.
+  ConstructorElement get unnamedListConstructor;
+
+  /// The 'filled' constructor of `List`.
+  ConstructorElement get filledListConstructor;
 }
 
 /// The core types in Dart.