Mojom compiler frontend: Populate the declaration_order field for Methods.

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

Index: mojo/dart/packages/_mojo_for_test_only/lib/regression_tests/regression_tests.mojom.dart
diff --git a/mojo/dart/packages/_mojo_for_test_only/lib/regression_tests/regression_tests.mojom.dart b/mojo/dart/packages/_mojo_for_test_only/lib/regression_tests/regression_tests.mojom.dart
index 5b3c4d895bdac1be70751e9f1665d68015385645..1a70d58e26a79032e580a8459581fa53575dfb18 100644
--- a/mojo/dart/packages/_mojo_for_test_only/lib/regression_tests/regression_tests.mojom.dart
+++ b/mojo/dart/packages/_mojo_for_test_only/lib/regression_tests/regression_tests.mojom.dart
@@ -3292,7 +3292,7 @@ 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);