Mojo C++ Bindings: Additional support for associated binding sets

mojo/public/cpp/bindings/associated_interface_ptr.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_INTERFACE_PTR_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_INTERFACE_PTR_H_
 
 #include <stdint.h>
 #include <utility>
 
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "mojo/public/cpp/bindings/associated_group.h"
 #include "mojo/public/cpp/bindings/associated_interface_ptr_info.h"
 #include "mojo/public/cpp/bindings/associated_interface_request.h"
 #include "mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h"
+#include "mojo/public/cpp/bindings/lib/multiplex_router.h"
+#include "mojo/public/cpp/system/message_pipe.h"
 
 namespace mojo {
 
 // Represents the client side of an associated interface. It is similar to
 // InterfacePtr, except that it doesn't own a message pipe handle.
 template <typename Interface>
 class AssociatedInterfacePtr {
  public:
   // Constructs an unbound AssociatedInterfacePtr.
   AssociatedInterfacePtr() {}
@@ skipping 171 matching lines @@
         base::ThreadTaskRunnerHandle::Get()) {
   AssociatedInterfaceRequest<Interface> request;
   AssociatedInterfacePtrInfo<Interface> ptr_info;
   group->CreateAssociatedInterface(AssociatedGroup::WILL_PASS_REQUEST,
                                    &ptr_info, &request);
 
   ptr->Bind(std::move(ptr_info), std::move(runner));
   return request;
 }
 
+// Creates an associated interface proxy which casts its messages into the void.
+template <typename Interface>
+void GetDummyProxyForTesting(AssociatedInterfacePtr<Interface>* proxy) {
+  MessagePipe pipe;
+  scoped_refptr<internal::MultiplexRouter> router =
+      new internal::MultiplexRouter(false, std::move(pipe.handle0),
+                                    base::ThreadTaskRunnerHandle::Get());
+  std::unique_ptr<AssociatedGroup> group = router->CreateAssociatedGroup();
+  GetProxy(proxy, group.get());
+}
+
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_INTERFACE_PTR_H_