[mojo] Implement pipe fusion API

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 <utility>
 
 #include "mojo/public/cpp/bindings/interface_ptr.h"
@@ skipping 99 matching lines @@
 //   collector->RegisterSource(std::move(source));
 //   CreateSource(std::move(source_request));  // Create implementation locally.
 //
 template <typename Interface>
 InterfaceRequest<Interface> GetProxy(InterfacePtr<Interface>* ptr) {
   MessagePipe pipe;
   ptr->Bind(InterfacePtrInfo<Interface>(std::move(pipe.handle0), 0u));
   return MakeRequest<Interface>(std::move(pipe.handle1));
 }
 
+// Fuses an InterfaceRequest<T> endpoint with an InterfacePtr<T> endpoint.

[yzshen1, 2016/03/11 17:17:20]

Nit: InterfacePtrInfo

+// Returns |true| on success or |false| on failure.
+template <typename Interface>
+bool FuseInterface(InterfaceRequest<Interface> request,
+                   InterfacePtrInfo<Interface> proxy_info) {
+  MojoResult result = FuseMessagePipes(request.PassMessagePipe(),
+                                       proxy_info.PassHandle());
+  return result == MOJO_RESULT_OK;
+}
+
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_REQUEST_H_