[mojo] Implement pipe fusion API

mojo/edk/system/core.h

 // Copyright 2013 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_EDK_SYSTEM_CORE_H_
 #define MOJO_EDK_SYSTEM_CORE_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 152 matching lines @@
                           uint32_t num_bytes,
                           const MojoHandle* handles,
                           uint32_t num_handles,
                           MojoWriteMessageFlags flags);
   MojoResult ReadMessage(MojoHandle message_pipe_handle,
                          void* bytes,
                          uint32_t* num_bytes,
                          MojoHandle* handles,
                          uint32_t* num_handles,
                          MojoReadMessageFlags flags);
+  MojoResult FuseMessagePipes(MojoHandle handle0, MojoHandle handle1);
 
   // These methods correspond to the API functions defined in
   // "mojo/public/c/system/data_pipe.h":
   MojoResult CreateDataPipe(
       const MojoCreateDataPipeOptions* options,
       MojoHandle* data_pipe_producer_handle,
       MojoHandle* data_pipe_consumer_handle);
   MojoResult WriteData(MojoHandle data_pipe_producer_handle,
                        const void* elements,
                        uint32_t* num_bytes,
@@ skipping 67 matching lines @@
   base::Lock mapping_table_lock_;  // Protects |mapping_table_|.
   MappingTable mapping_table_;
 
   DISALLOW_COPY_AND_ASSIGN(Core);
 };
 
 }  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_CORE_H_