Use ChannelMojo for the utility process.

content/public/common/child_process_host.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_COMMON_CHILD_PROCESS_HOST_H_
 #define CONTENT_PUBLIC_COMMON_CHILD_PROCESS_HOST_H_
 
 #include <stdint.h>
 
 #include "base/files/scoped_file.h"
@@ skipping 63 matching lines @@
   static base::FilePath GetChildPath(int flags);
 
   // Send the shutdown message to the child process.
   // Does not check with the delegate's CanShutdown.
   virtual void ForceShutdown() = 0;
 
   // Creates the IPC channel.  Returns the channel id if it succeeded, an
   // empty string otherwise
   virtual std::string CreateChannel() = 0;
 
+  // Creates the IPC channel on top of Mojo. Returns the Mojo channel token if
+  // succeeded, or an empty string on failure.
+  virtual std::string CreateChannelMojo(const std::string& child_token) = 0;
+
   // Returns true iff the IPC channel is currently being opened;
   virtual bool IsChannelOpening() = 0;
 
   // Adds an IPC message filter.  A reference will be kept to the filter.
   virtual void AddFilter(IPC::MessageFilter* filter) = 0;
 
 #if defined(OS_POSIX)
   // See IPC::Channel::TakeClientFileDescriptor.
   virtual base::ScopedFD TakeClientFileDescriptor() = 0;
 #endif
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_CHILD_PROCESS_HOST_H_