Support 'Conditional' idl attribute.

client/dom/generated/src/frog/MutationRecord.dart

Index: client/dom/generated/src/frog/MutationRecord.dart
diff --git a/client/dom/generated/src/frog/MutationRecord.dart b/client/dom/generated/src/frog/MutationRecord.dart
deleted file mode 100644
index 0c7d48511434a52ebff4f35c40b5dce191df8799..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/frog/MutationRecord.dart
+++ /dev/null
@@ -1,21 +0,0 @@
-
-class _MutationRecordJs extends _DOMTypeJs implements MutationRecord native "*MutationRecord" {
-
-  _NodeListJs get addedNodes() native "return this.addedNodes;";
-
-  String get attributeName() native "return this.attributeName;";
-
-  String get attributeNamespace() native "return this.attributeNamespace;";
-
-  _NodeJs get nextSibling() native "return this.nextSibling;";
-
-  String get oldValue() native "return this.oldValue;";
-
-  _NodeJs get previousSibling() native "return this.previousSibling;";
-
-  _NodeListJs get removedNodes() native "return this.removedNodes;";
-
-  _NodeJs get target() native "return this.target;";
-
-  String get type() native "return this.type;";
-}