Mojo C++ bindings: introduce an optional array to store transferred interface IDs in messages.

mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h

Index: mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h
diff --git a/mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h b/mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h
index 9e70d92b2d01ab6df73b7855f381d5a2d52f9e1f..f6a7777cf8c02b61f181e348df1fcf52dc18ede6 100644
--- a/mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h
+++ b/mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h
@@ -19,7 +19,6 @@
 #include "base/memory/ref_counted.h"
 #include "base/single_thread_task_runner.h"
 #include "mojo/public/cpp/bindings/associated_group.h"
-#include "mojo/public/cpp/bindings/associated_group_controller.h"
 #include "mojo/public/cpp/bindings/associated_interface_ptr_info.h"
 #include "mojo/public/cpp/bindings/connection_error_callback.h"
 #include "mojo/public/cpp/bindings/interface_endpoint_client.h"
@@ -100,9 +99,6 @@ class AssociatedInterfacePtrState {
         base::WrapUnique(new typename Interface::ResponseValidator_()), false,
         std::move(runner), 0u));
     proxy_.reset(new Proxy(endpoint_client_.get()));
-    if (Interface::PassesAssociatedKinds_) {
-      proxy_->set_group_controller(endpoint_client_->group_controller());
-    }
   }
 
   // After this method is called, the object is in an invalid state and