Fix VariableDefinitions.endToken for formal parameters.

sdk/lib/_internal/compiler/implementation/dart_backend/utils.dart

Index: sdk/lib/_internal/compiler/implementation/dart_backend/utils.dart
diff --git a/sdk/lib/_internal/compiler/implementation/dart_backend/utils.dart b/sdk/lib/_internal/compiler/implementation/dart_backend/utils.dart
index 0d421b3161f600fd93cb930e1cb3284d79aa21ac..c30a2cfab6b5ea704096861fdaff2e97153ff9d5 100644
--- a/sdk/lib/_internal/compiler/implementation/dart_backend/utils.dart
+++ b/sdk/lib/_internal/compiler/implementation/dart_backend/utils.dart
@@ -213,8 +213,7 @@ class CloningVisitor implements Visitor<Node> {
       visit(node.name), visit(node.bound));
 
   visitVariableDefinitions(VariableDefinitions node) => new VariableDefinitions(
-      visit(node.type), visit(node.modifiers), visit(node.definitions),
-      node.endToken);
+      visit(node.type), visit(node.modifiers), visit(node.definitions));
 
   visitWhile(While node) => new While(
       visit(node.condition), visit(node.body), node.whileKeyword);