Revert 69264 - Add support for sockets that can listen and accept a connectio...

ipc/ipc_channel_posix.h

Index: ipc/ipc_channel_posix.h
===================================================================
--- ipc/ipc_channel_posix.h	(revision 69360)
+++ ipc/ipc_channel_posix.h	(working copy)
@@ -40,10 +40,12 @@
 
 namespace IPC {
 
+// An implementation of ChannelImpl for POSIX systems that works via
+// socketpairs.  See the .cc file for an overview of the implementation.
 class Channel::ChannelImpl : public MessageLoopForIO::Watcher {
  public:
   // Mirror methods of Channel, see ipc_channel.h for description.
-  ChannelImpl(const IPC::ChannelHandle& channel_handle, Mode mode,
+  ChannelImpl(const IPC::ChannelHandle &channel_handle, Mode mode,
               Listener* listener);
   ~ChannelImpl();
   bool Connect();
@@ -51,23 +53,13 @@
   void set_listener(Listener* listener) { listener_ = listener; }
   bool Send(Message* message);
   int GetClientFileDescriptor() const;
-  bool AcceptsConnections() const;
-  bool HasAcceptedConnection() const;
-  void ResetToAcceptingConnectionState();
 
  private:
-  bool CreatePipe(const IPC::ChannelHandle& channel_handle,
-                  bool uses_domain_sockets,
-                  bool listening_socket);
+  bool CreatePipe(const IPC::ChannelHandle &channel_handle, Mode mode);
 
   bool ProcessIncomingMessages();
   bool ProcessOutgoingMessages();
 
-  bool AcceptConnection();
-  void ClosePipeOnError();
-  void QueueHelloMessage();
-  bool IsHelloMessage(const Message* m) const;
-
   // MessageLoopForIO::Watcher implementation.
   virtual void OnFileCanReadWithoutBlocking(int fd);
   virtual void OnFileCanWriteWithoutBlocking(int fd);
@@ -82,14 +74,17 @@
 
   // Indicates whether we're currently blocked waiting for a write to complete.
   bool is_blocked_on_write_;
-  bool waiting_connect_;
 
   // If sending a message blocks then we use this variable
   // to keep track of where we are.
   size_t message_send_bytes_written_;
 
-  // File descriptor we're listening on for new connections if we listen
-  // for connections.
+  // If the kTestingChannelID flag is specified, we use a FIFO instead of
+  // a socketpair().
+  bool uses_fifo_;
+
+  // File descriptor we're listening on for new connections in the FIFO case;
+  // unused otherwise.
   int server_listen_pipe_;
 
   // The pipe used for communication.
@@ -137,8 +132,10 @@
   std::string input_overflow_buf_;
   std::vector<int> input_overflow_fds_;
 
-  // True if we are responsible for unlinking the unix domain socket file.
-  bool must_unlink_;
+  // In server-mode, we have to wait for the client to connect before we
+  // can begin reading.  We make use of the input_state_ when performing
+  // the connect operation in overlapped mode.
+  bool waiting_connect_;
 
   ScopedRunnableMethodFactory<ChannelImpl> factory_;