IPC: Generalize FileDescriptorSet to MessageAttachmentSet

ipc/ipc_channel_posix.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_POSIX_H_
 #define IPC_IPC_CHANNEL_POSIX_H_
 
 #include "ipc/ipc_channel.h"
 
 #include <sys/socket.h>  // for CMSG macros
 
 #include <queue>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/files/scoped_file.h"
 #include "base/message_loop/message_loop.h"
 #include "base/process/process.h"
-#include "ipc/file_descriptor_set_posix.h"
 #include "ipc/ipc_channel_reader.h"
+#include "ipc/ipc_message_attachment_set.h"
 
 #if !defined(OS_MACOSX)
 // On Linux, the seccomp sandbox makes it very expensive to call
 // recvmsg() and sendmsg(). The restriction on calling read() and write(), which
 // are cheap, is that we can't pass file descriptors over them.
 //
 // As we cannot anticipate when the sender will provide us with file
 // descriptors, we have to make the decision about whether we call read() or
 // recvmsg() before we actually make the call. The easiest option is to
 // create a dedicated socketpair() for exchanging file descriptors. Any file
@@ skipping 139 matching lines @@
   // the pipe.  On POSIX it's used as a key in a local map of file descriptors.
   std::string pipe_name_;
 
   // Messages to be sent are queued here.
   std::queue<Message*> output_queue_;
 
   // We assume a worst case: kReadBufferSize bytes of messages, where each
   // message has no payload and a full complement of descriptors.
   static const size_t kMaxReadFDs =
       (Channel::kReadBufferSize / sizeof(IPC::Message::Header)) *
-      FileDescriptorSet::kMaxDescriptorsPerMessage;
+      MessageAttachmentSet::kMaxDescriptorsPerMessage;
 
   // Buffer size for file descriptors used for recvmsg. On Mac the CMSG macros
   // don't seem to be constant so we have to pick a "large enough" value.
 #if defined(OS_MACOSX)
   static const size_t kMaxReadFDBuffer = 1024;
 #else
   static const size_t kMaxReadFDBuffer = CMSG_SPACE(sizeof(int) * kMaxReadFDs);
 #endif
 
   // Temporary buffer used to receive the file descriptors from recvmsg.
@@ skipping 24 matching lines @@
   // If non-zero, overrides the process ID sent in the hello message.
   static int global_pid_;
 #endif  // OS_LINUX
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ChannelPosix);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_POSIX_H_