Mojom frontend: Allow non-reference types in non-zero versions of a struct.

mojo/dart/packages/_mojo_for_test_only/lib/imported/sample_import.mojom.dart

Index: mojo/dart/packages/_mojo_for_test_only/lib/imported/sample_import.mojom.dart
diff --git a/mojo/dart/packages/_mojo_for_test_only/lib/imported/sample_import.mojom.dart b/mojo/dart/packages/_mojo_for_test_only/lib/imported/sample_import.mojom.dart
index 245f669a9053b00d8c3532cd6578583bb43d0ba3..c682f00c14155422581e28d8436bc4f0ed579036 100644
--- a/mojo/dart/packages/_mojo_for_test_only/lib/imported/sample_import.mojom.dart
+++ b/mojo/dart/packages/_mojo_for_test_only/lib/imported/sample_import.mojom.dart
@@ -542,7 +542,7 @@ 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 = "H4sIAAAJbogC/9SY3VLTQBSANwWUn4JVfuRHJQqjVceGy45XMNixHRmHgV6UKygl0jhpU5Iwg3de8ghc+gg+ho/hY3inu/QsSU52YVtLU87MmU2ym+Tst2d/zpknbclAuQYlfs7LUVTidkQLvjNCNQuPi1C2oDyH8geUL6k+o1re2y7sfyrsvbcaLcf1zaPcRtPx66a7W6+2TELe0jYrwnYluCg1fdP9Uq2Zl99dpvpY2H7bsZr+NfXtH76mdc+F9XumHzXtUirQ7wzqN7sfovpzJLhnqPJjUX4X6ej92bRkPLTo98Pylwofx/XQM1ZuE7HMUGW/xl16SnWWqmQ4YnY9gv7bVI+oGqeea9hOrWobx45zbJtG3WmYhlVt2o5VM/wTo+F8dQzPrbUvWqeHNn1u8UH0jEOreWQ1jz3DNz3fM7xqo2Wb+217cuydBvuvDny5PefA53cq6tfcH9e0qN1FuB8n3XGtSLg+pMqGeKewWd74/HGrAM9fgW8KueaC1pgvc4dUAnxV5yf383Ei5p7VxJwmFLnnFf15iuo9qpulnU0GfZVeP5Hy5q3i/jwz4LxV+aZ7zDcDe0B5p3TpqNxeMV/eKs53dsD56mif46Irrr9FxPNAwnMB1grxLkbIC6qLYb6ShpjvCszFfvPFdsyH/FBDfqSFzhPcj3V0nsByE3eCuK9JuE/D2vPB2aUc/DrtmZDjakJ+GvM/7f845CUcloBFiMM71zw5pbaJz3kg/eYxivyD2zXaIRe8zq1LuEzCeaZ9WiRkDvYWdIyM8WFry/2E5l0qZAffD9ZRv3n9CFETVT8jaB5jGQMXPpPED8swxv3m1i8+miKfbxI+ekJ8ZHFer+cZjyti8wwqsB3jCcUbbPyGQ+vQd+DxC+KNzPD1519uf16L+kWv4jlZ3KHDWEa5BgEH5juR0L53U1zO4wxNEmfoknNDqsv9oagYZ8TiZRRgYL7pAeWrynOoxzxxXMHtRDyvAgrMc/KO8eTnX56P6DXPNKxTWxu75fA5D/Hk1TGeUwPKE8cJWUV/ysI7ku9eOdZt59tY3x5QxVnE2PqMGojiqkHIt10Anz+SfFse7XsVLcivdMP1oMN97w3E0DKuOfQC5ryQ0DzoNP/M98WZDvNvs7ecf4vlOzF/aIi5L94R7rL8Mpa5LjlXFNc3breUc5CKE/r50h3h/S8AAP//UO1EZ7gaAAA=";
+  var serializedRuntimeTypeInfo = "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";
 
   // Deserialize RuntimeTypeInfo
   var bytes = BASE64.decode(serializedRuntimeTypeInfo);