Mojo C++ Bindings: Extract AssociatedGroupController from MultiplexRouter

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 f0cf730f1a4491af9e6f495f54082e0747379d2a..7fd80be6962be2cbce040ef71accdf8c1ea4ccb4 100644
--- a/mojo/public/cpp/bindings/lib/serialization_context.cc
+++ b/mojo/public/cpp/bindings/lib/serialization_context.cc
@@ -7,7 +7,7 @@
 #include <limits>
 
 #include "base/logging.h"
-#include "mojo/public/cpp/bindings/lib/multiplex_router.h"
+#include "mojo/public/cpp/bindings/associated_group_controller.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
@@ -51,8 +51,8 @@ void SerializedHandleVector::Swap(std::vector<mojo::Handle>* other) {
 SerializationContext::SerializationContext() {}
 
 SerializationContext::SerializationContext(
-    scoped_refptr<MultiplexRouter> in_router)
-    : router(std::move(in_router)) {}
+    scoped_refptr<AssociatedGroupController> in_group_controller)
+    : group_controller(std::move(in_group_controller)) {}
 
 SerializationContext::~SerializationContext() {
   DCHECK(!custom_contexts || custom_contexts->empty());