Fix type inference of factory constructor invocations.

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 d22353601ffdf7de2c8324819140aaa7e8d7b48f..c521a54edc51f08739dea5030d5f839cbbb1f4d3 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
@@ -186,6 +186,10 @@ class KernelAstFactory implements AstFactory<VariableDeclaration> {
   @override
   StaticInvocation staticInvocation(Procedure target, Arguments arguments,
       {bool isConst: false}) {
+    if (target.kind == ProcedureKind.Factory) {
+      return new KernelFactoryConstructorInvocation(target, arguments,
+          isConst: isConst);
+    }
     return new KernelStaticInvocation(target, arguments, isConst: isConst);
   }