Mojom frontend: Correctly handle empty structs in computeVersionInfo()

mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart

Index: mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart
diff --git a/mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart b/mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart
index 3a38a555585e20509f2bd55b188c0cbbea870416..4be0dee530011eb1bb3f7f19e3eea5f77a7618e7 100644
--- a/mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart
+++ b/mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart
@@ -1331,7 +1331,7 @@ mojom_types.RuntimeTypeInfo  _initRuntimeTypeInfo() {
   // serializedRuntimeTypeInfo contains the bytes of the Mojo serialization of
   // a mojom_types.RuntimeTypeInfo struct describing the Mojom types in this
   // file. The string contains the base64 encoding of the gzip-compressed bytes.
-  var serializedRuntimeTypeInfo = "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";
+  var serializedRuntimeTypeInfo = "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";
 
   // Deserialize RuntimeTypeInfo
   var bytes = BASE64.decode(serializedRuntimeTypeInfo);