[mojo] Implement pipe fusion API

mojo/edk/embedder/entrypoints.cc

 // 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.
 
 #include <stdint.h>
 
 #include "mojo/edk/embedder/embedder_internal.h"
 #include "mojo/edk/system/core.h"
 #include "mojo/public/c/system/buffer.h"
 #include "mojo/public/c/system/data_pipe.h"
@@ skipping 85 matching lines @@
 MojoResult MojoReadMessage(MojoHandle message_pipe_handle,
                            void* bytes,
                            uint32_t* num_bytes,
                            MojoHandle* handles,
                            uint32_t* num_handles,
                            MojoReadMessageFlags flags) {
   return g_core->ReadMessage(
       message_pipe_handle, bytes, num_bytes, handles, num_handles, flags);
 }
 
+MojoResult MojoFuseMessagePipes(MojoHandle handle0, MojoHandle handle1) {
+  return g_core->FuseMessagePipes(handle0, handle1);
+}
+
 MojoResult MojoCreateDataPipe(const MojoCreateDataPipeOptions* options,
                               MojoHandle* data_pipe_producer_handle,
                               MojoHandle* data_pipe_consumer_handle) {
   return g_core->CreateDataPipe(options, data_pipe_producer_handle,
                                 data_pipe_consumer_handle);
 }
 
 MojoResult MojoWriteData(MojoHandle data_pipe_producer_handle,
                          const void* elements,
                          uint32_t* num_elements,
@@ skipping 57 matching lines @@
                          void** buffer,
                          MojoMapBufferFlags flags) {
   return g_core->MapBuffer(buffer_handle, offset, num_bytes, buffer, flags);
 }
 
 MojoResult MojoUnmapBuffer(void* buffer) {
   return g_core->UnmapBuffer(buffer);
 }
 
 }  // extern "C"