Fix constructor invocation type inference.

pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart

Index: pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart
index d878af8372685c5ccad37cfa24ca4794d0ddb2b7..6982553f7b23b4c6997cb7abad3df77eb0012a6d 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart
@@ -13,6 +13,12 @@ import 'kernel_shadow_ast.dart';
 /// Concrete implementation of [builder.AstFactory] for building a kernel AST.
 class KernelAstFactory implements AstFactory<VariableDeclaration> {
   @override
+  Arguments arguments(List<Expression> positional,
+      {List<DartType> types, List<NamedExpression> named}) {
+    return new KernelArguments(positional, types: types, named: named);
+  }
+
+  @override
   AsExpression asExpression(Expression operand, Token operator, DartType type) {
     return new KernelAsExpression(operand, type)
       ..fileOffset = offsetForToken(operator);
@@ -168,6 +174,11 @@ class KernelAstFactory implements AstFactory<VariableDeclaration> {
   }
 
   @override
+  void setExplicitArgumentTypes(Arguments arguments, List<DartType> types) {
+    KernelArguments.setExplicitArgumentTypes(arguments, types);
+  }
+
+  @override
   StaticGet staticGet(Member readTarget, Token token) {
     return new KernelStaticGet(readTarget)..fileOffset = offsetForToken(token);
   }