add arguments to constructor completions

pkg/analysis_server/lib/src/services/completion/optype.dart

Index: pkg/analysis_server/lib/src/services/completion/optype.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/optype.dart b/pkg/analysis_server/lib/src/services/completion/optype.dart
index ba7892cd0c4d3a1498da018665cab02e74dc9eba..197ffbaaf48a55eb05b88582ce249dbff56c0076 100644
--- a/pkg/analysis_server/lib/src/services/completion/optype.dart
+++ b/pkg/analysis_server/lib/src/services/completion/optype.dart
@@ -16,6 +16,11 @@ import 'package:analyzer/src/generated/scanner.dart';
 class OpType {
 
   /**
+   * Indicates whether constructor suggestions should be included.
+   */
+  bool includeConstructorSuggestions = false;
+
+  /**
    * Indicates whether invocation suggestions should be included.
    */
   bool includeInvocationSuggestions = false;
@@ -346,7 +351,7 @@ class _OpTypeAstVisitor extends GeneralizingAstVisitor {
   @override
   void visitInstanceCreationExpression(InstanceCreationExpression node) {
     if (identical(entity, node.constructorName)) {
-      optype.includeTypeNameSuggestions = true;
+      optype.includeConstructorSuggestions = true;
     }
   }