Fix constructor invocation type inference.

pkg/front_end/lib/src/fasta/builder/ast_factory.dart

Index: pkg/front_end/lib/src/fasta/builder/ast_factory.dart
diff --git a/pkg/front_end/lib/src/fasta/builder/ast_factory.dart b/pkg/front_end/lib/src/fasta/builder/ast_factory.dart
index ec853d80e39dd0db99b2bea4a147d49cb99ebb4f..453281083a1c205fd5432163516d1eaa42f16b75 100644
--- a/pkg/front_end/lib/src/fasta/builder/ast_factory.dart
+++ b/pkg/front_end/lib/src/fasta/builder/ast_factory.dart
@@ -35,6 +35,10 @@ import 'package:kernel/ast.dart';
 /// shadow-ify [DartType], since analyzer ASTs need to be able to record the
 /// exact tokens that were used to specify a type.
 abstract class AstFactory<V> {
+  /// Creates an [Arguments] data structure.
+  Arguments arguments(List<Expression> positional,
+      {List<DartType> types, List<NamedExpression> named});
+
   /// Creates an `as` expression.
   AsExpression asExpression(Expression operand, Token operator, DartType type);
 
@@ -132,6 +136,10 @@ abstract class AstFactory<V> {
   /// Creates a return statement.
   Statement returnStatement(Expression expression, Token token);
 
+  /// Updates an [Arguments] data structure with the given generic [types].
+  /// Should only be used when [types] were specified explicitly.
+  void setExplicitArgumentTypes(Arguments arguments, List<DartType> types);
+
   /// Creates a read of a static variable.
   StaticGet staticGet(Member readTarget, Token token);