Add summary support for ParameterElement.defaultValueCode.

pkg/analyzer/lib/src/summary/resynthesize.dart

Index: pkg/analyzer/lib/src/summary/resynthesize.dart
diff --git a/pkg/analyzer/lib/src/summary/resynthesize.dart b/pkg/analyzer/lib/src/summary/resynthesize.dart
index 1f8a374ba89a1e6f52dcac6b74bd81d7a8322269..4e80adad351089a78991f3135ea4677c9e6b8c45 100644
--- a/pkg/analyzer/lib/src/summary/resynthesize.dart
+++ b/pkg/analyzer/lib/src/summary/resynthesize.dart
@@ -1651,6 +1651,8 @@ class _LibraryResynthesizer {
         if (serializedParameter.defaultValue != null) {
           defaultParameter.constantInitializer =
               _buildConstExpression(serializedParameter.defaultValue);
+          defaultParameter.defaultValueCode =
+              serializedParameter.defaultValueCode;
         }
       }
       parameterElement = initializingParameter;
@@ -1667,6 +1669,8 @@ class _LibraryResynthesizer {
         if (serializedParameter.defaultValue != null) {
           defaultParameter.constantInitializer =
               _buildConstExpression(serializedParameter.defaultValue);
+          defaultParameter.defaultValueCode =
+              serializedParameter.defaultValueCode;
         }
       }
     }