Mojo C++ bindings: Generate InterfaceHandle<> instead of InterfacePtr<>.

mojo/public/cpp/bindings/interface_request.h

 // Copyright 2014 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_INTERFACE_REQUEST_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_REQUEST_H_
 
 #include <cstddef>
 
 #include "mojo/public/cpp/system/message_pipe.h"
@@ skipping 104 matching lines @@
 //   collector->RegisterSource(source.Pass());
 //   CreateSource(source_request.Pass());  // Create implementation locally.
 //
 template <typename Interface>
 InterfaceRequest<Interface> GetProxy(InterfacePtr<Interface>* ptr) {
   MessagePipe pipe;
   ptr->Bind(InterfaceHandle<Interface>(pipe.handle0.Pass(), 0u));
   return MakeRequest<Interface>(pipe.handle1.Pass());
 }
 
+// This is an overload of GetProxy() that assumes that the client end of the
+// handle is an InterfaceHandle<>. It creates a new message pipe over which the
+// Interface is to be served. InterfaceHandle<> represents the client's end,
+// and InterfaceRequest<> should be used to bind to an implementation.
+template <typename Interface>
+InterfaceRequest<Interface> GetProxy(InterfaceHandle<Interface>* ptr) {
+  MessagePipe pipe;
+  *ptr = InterfaceHandle<Interface>(pipe.handle0.Pass(), 0u);
+  return MakeRequest<Interface>(pipe.handle1.Pass());
+}
+
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_REQUEST_H_