Use typed RefactoringOptions in the Dart version of the protocol.

pkg/analysis_server/test/integration/protocol_matchers.dart

Index: pkg/analysis_server/test/integration/protocol_matchers.dart
diff --git a/pkg/analysis_server/test/integration/protocol_matchers.dart b/pkg/analysis_server/test/integration/protocol_matchers.dart
index f27f5483cdd1b5c36b2f900d28bd1054e5a8853b..af09308bee05c35b343c64e3263f051c8bd91477 100644
--- a/pkg/analysis_server/test/integration/protocol_matchers.dart
+++ b/pkg/analysis_server/test/integration/protocol_matchers.dart
@@ -631,7 +631,7 @@ final Matcher isEditGetFixesResult = new LazyMatcher(() => new MatchesJsonObject
  *   "offset": int
  *   "length": int
  *   "validateOnly": bool
- *   "options": optional object
+ *   "options": optional RefactoringOptions
  * }
  */
 final Matcher isEditGetRefactoringParams = new LazyMatcher(() => new MatchesJsonObject(
@@ -642,7 +642,7 @@ final Matcher isEditGetRefactoringParams = new LazyMatcher(() => new MatchesJson
     "length": isInt,
     "validateOnly": isBool
   }, optionalFields: {
-    "options": isObject
+    "options": isRefactoringOptions
   }));
 
 /**
@@ -1533,6 +1533,15 @@ final Matcher isRefactoringMethodParameter = new LazyMatcher(() => new MatchesJs
   }));
 
 /**
+ * RefactoringOptions
+ *
+ * {
+ * }
+ */
+final Matcher isRefactoringOptions = new LazyMatcher(() => new MatchesJsonObject(
+  "RefactoringOptions", null));
+
+/**
  * RefactoringMethodParameterKind
  *
  * enum {