Use ChannelMojo for NaCl PPAPI channels.

ipc/ipc_channel.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 IPC_IPC_CHANNEL_H_
 #define IPC_IPC_CHANNEL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 279 matching lines @@
   // Generates a channel ID that's non-predictable and unique.
   static std::string GenerateUniqueRandomChannelID();
 
   // Generates a channel ID that, if passed to the client as a shared secret,
   // will validate that the client's authenticity. On platforms that do not
   // require additional this is simply calls GenerateUniqueRandomChannelID().
   // For portability the prefix should not include the \ character.
   static std::string GenerateVerifiedChannelID(const std::string& prefix);
 #endif
 
+  // Deprecated: Create a mojo::MessagePipe directly and release() its handles
+  // instead.
+  //
   // Generates a pair of channel handles that can be used as the client and
-  // server ends of a ChannelMojo. |name_postfix| is appended to the end of the
-  // handle name to help identify the handles.
-  //
-  // Note, when using ChannelMojo, |ChannelHandle::name| serves no functional
-  // purpose other than to identify the channel in logging.
+  // server ends of a ChannelMojo. |name_postfix| is ignored.
   static void GenerateMojoChannelHandlePair(
       const std::string& name_postfix,
       IPC::ChannelHandle* handle0,
       IPC::ChannelHandle* handle1);
 
 #if defined(OS_LINUX)
   // Sandboxed processes live in a PID namespace, so when sending the IPC hello
   // message from client to server we need to send the PID from the global
   // PID namespace.
   static void SetGlobalPid(int pid);
@@ skipping 42 matching lines @@
 
 #if defined(OS_POSIX)
 // SocketPair() creates a pair of socket FDs suitable for using with
 // IPC::Channel.
 IPC_EXPORT bool SocketPair(int* fd1, int* fd2);
 #endif
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_H_