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

mojo/public/cpp/bindings/lib/serialization_context.cc

Index: mojo/public/cpp/bindings/lib/serialization_context.cc
diff --git a/mojo/public/cpp/bindings/lib/serialization_context.cc b/mojo/public/cpp/bindings/lib/serialization_context.cc
index 7fd80be6962be2cbce040ef71accdf8c1ea4ccb4..e2fd5c6e18a1863f994fce38391d977a0eb0b7bb 100644
--- a/mojo/public/cpp/bindings/lib/serialization_context.cc
+++ b/mojo/public/cpp/bindings/lib/serialization_context.cc
@@ -7,7 +7,6 @@
 #include <limits>
 
 #include "base/logging.h"
-#include "mojo/public/cpp/bindings/associated_group_controller.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
@@ -50,10 +49,6 @@ void SerializedHandleVector::Swap(std::vector<mojo::Handle>* other) {
 
 SerializationContext::SerializationContext() {}
 
-SerializationContext::SerializationContext(
-    scoped_refptr<AssociatedGroupController> in_group_controller)
-    : group_controller(std::move(in_group_controller)) {}
-
 SerializationContext::~SerializationContext() {
   DCHECK(!custom_contexts || custom_contexts->empty());
 }