Compute all default values of parameters.

pkg/analyzer/lib/src/generated/constant.dart

Index: pkg/analyzer/lib/src/generated/constant.dart
diff --git a/pkg/analyzer/lib/src/generated/constant.dart b/pkg/analyzer/lib/src/generated/constant.dart
index 006d3a901e2e121d0f794957975e812d04433bfe..b57f9e01d99ba6c8f6c24f01865c5c7d375d4569 100644
--- a/pkg/analyzer/lib/src/generated/constant.dart
+++ b/pkg/analyzer/lib/src/generated/constant.dart
@@ -189,6 +189,13 @@ class ConstantAstCloner extends AstCloner {
     invocation.staticElement = node.staticElement;
     return invocation;
   }
+
+  @override
+  TypeName visitTypeName(TypeName node) {
+    TypeName typeName = super.visitTypeName(node);
+    typeName.type = node.type;
+    return typeName;
+  }
 }
 
 /**
@@ -1284,6 +1291,16 @@ class ConstantFinder extends RecursiveAstVisitor<Object> {
   }
 
   @override
+  Object visitDefaultFormalParameter(DefaultFormalParameter node) {
+    super.visitDefaultFormalParameter(node);
+    Expression defaultValue = node.defaultValue;
+    if (defaultValue != null && node.element != null) {
+      constantsToCompute.add(node.element);
+    }
+    return null;
+  }
+
+  @override
   Object visitVariableDeclaration(VariableDeclaration node) {
     super.visitVariableDeclaration(node);
     Expression initializer = node.initializer;