Mojo C++ bindings: support sync methods - part 2

mojo/public/interfaces/bindings/tests/test_sync_methods.mojom

Index: mojo/public/interfaces/bindings/tests/test_sync_methods.mojom
diff --git a/mojo/public/interfaces/bindings/tests/test_sync_methods.mojom b/mojo/public/interfaces/bindings/tests/test_sync_methods.mojom
index 2df8a1c93c378f355e09cd19a82c882db456ce8d..1a55a0f32688af0fe5fc3f55c320a4d3090f9a30 100644
--- a/mojo/public/interfaces/bindings/tests/test_sync_methods.mojom
+++ b/mojo/public/interfaces/bindings/tests/test_sync_methods.mojom
@@ -4,16 +4,26 @@
 
 module mojo.test;
 
-interface TestSync {
+interface TestCodeGeneration {
+  [Sync]
+  NoInput() => (int32 result);
+
+  [Sync]
+  NoOutput(int32 value) => ();
+
   [Sync]
-  Get() => (int32 result);
+  NoInOut() => ();
 
   [Sync]
-  Set(int32 value) => ();
+  HaveInOut(int32 value1, int32 value2) => (int32 result1, int32 result2);
+};
 
+interface TestSync {
   [Sync]
   Ping() => ();
 
   [Sync]
   Echo(int32 value) => (int32 result);
+
+  AsyncEcho(int32 value) => (int32 result);
 };