Mac: Give app_shim code a nicer home

apps/app_shim/unix_domain_socket_acceptor.cc

-// Copyright 2014 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.
-
-#include "apps/app_shim/unix_domain_socket_acceptor.h"
-
-#include "base/files/file_util.h"
-#include "base/files/scoped_file.h"
-#include "base/logging.h"
-#include "ipc/unix_domain_socket_util.h"
-
-namespace apps {
-
-UnixDomainSocketAcceptor::UnixDomainSocketAcceptor(const base::FilePath& path,
-                                                   Delegate* delegate)
-    : path_(path), delegate_(delegate), listen_fd_(-1) {
-  DCHECK(delegate_);
-  CreateSocket();
-}
-
-UnixDomainSocketAcceptor::~UnixDomainSocketAcceptor() {
-  Close();
-}
-
-bool UnixDomainSocketAcceptor::CreateSocket() {
-  DCHECK(listen_fd_ < 0);
-
-  // Create the socket.
-  return IPC::CreateServerUnixDomainSocket(path_, &listen_fd_);
-}
-
-bool UnixDomainSocketAcceptor::Listen() {
-  if (listen_fd_ < 0)
-    return false;
-
-  // Watch the fd for connections, and turn any connections into
-  // active sockets.
-  base::MessageLoopForIO::current()->WatchFileDescriptor(
-      listen_fd_,
-      true,
-      base::MessageLoopForIO::WATCH_READ,
-      &server_listen_connection_watcher_,
-      this);
-  return true;
-}
-
-// Called by libevent when we can read from the fd without blocking.
-void UnixDomainSocketAcceptor::OnFileCanReadWithoutBlocking(int fd) {
-  DCHECK(fd == listen_fd_);
-  int new_fd = -1;
-  if (!IPC::ServerAcceptConnection(listen_fd_, &new_fd)) {
-    Close();
-    delegate_->OnListenError();
-    return;
-  }
-  base::ScopedFD scoped_fd(new_fd);
-
-  if (!scoped_fd.is_valid()) {
-    // The accept() failed, but not in such a way that the factory needs to be
-    // shut down.
-    return;
-  }
-
-  // Verify that the IPC channel peer is running as the same user.
-  if (!IPC::IsPeerAuthorized(scoped_fd.get()))
-    return;
-
-  IPC::ChannelHandle handle(std::string(),
-                            base::FileDescriptor(scoped_fd.release(), true));
-  delegate_->OnClientConnected(handle);
-}
-
-void UnixDomainSocketAcceptor::OnFileCanWriteWithoutBlocking(int fd) {
-  NOTREACHED() << "Listen fd should never be writable.";
-}
-
-void UnixDomainSocketAcceptor::Close() {
-  if (listen_fd_ < 0)
-    return;
-  if (IGNORE_EINTR(close(listen_fd_)) < 0)
-    PLOG(ERROR) << "close";
-  listen_fd_ = -1;
-  if (unlink(path_.value().c_str()) < 0)
-    PLOG(ERROR) << "unlink";
-
-  // Unregister libevent for the listening socket and close it.
-  server_listen_connection_watcher_.StopWatchingFileDescriptor();
-}
-
-}  // namespace apps