Make the fuchsia mojo/public repo the source of truth.

mojo/dart/packages/_mojo_for_test_only/lib/imported/sample_import2.mojom.dart

 // WARNING: DO NOT EDIT. This file was generated by a program.
 // See $MOJO_SDK/tools/bindings/mojom_bindings_generator.py.
 
 library sample_import2_mojom;
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:io';
 import 'dart:typed_data';
 import 'package:mojo/bindings.dart' as bindings;
 import 'package:mojo/mojo/bindings/types/mojom_types.mojom.dart' as mojom_types;
@@ skipping 217 matching lines @@
 
 Map<String, mojom_types.UserDefinedType> getAllMojomTypeDefinitions() {
   return getRuntimeTypeInfo().typeMap;
 }
 
 var _runtimeTypeInfo;
 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);
   var unzippedBytes = new ZLibDecoder().convert(bytes);
   var bdata = new ByteData.view(unzippedBytes.buffer);
   var message = new bindings.Message(bdata, null, unzippedBytes.length, 0);
   _runtimeTypeInfo = mojom_types.RuntimeTypeInfo.deserialize(message);
   sample_import_mojom.getAllMojomTypeDefinitions()
       .forEach((String s, mojom_types.UserDefinedType udt) {
           _runtimeTypeInfo.typeMap[s] = udt;
       });
 
   return _runtimeTypeInfo;
 }