LibIPC: Move AutoCloseFileDescriptor to its own header

Author: https://github.com/stasoid
Commit: ccf303eefc
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5010
Reviewed-by: https://github.com/ADKaster ✅

Libraries/LibIPC/TransportSocket.h

@@ -10,6 +10,7 @@
 #include <AK/MemoryStream.h>
 #include <AK/Queue.h>
 #include <LibCore/Socket.h>
+#include <LibIPC/AutoCloseFileDescriptor.h>
 #include <LibIPC/File.h>
 #include <LibThreading/ConditionVariable.h>
 #include <LibThreading/MutexProtected.h>
@@ -18,24 +19,6 @@
 
 namespace IPC {
 
-class AutoCloseFileDescriptor : public RefCounted<AutoCloseFileDescriptor> {
-public:
-    AutoCloseFileDescriptor(int fd);
-    ~AutoCloseFileDescriptor();
-
-    int value() const { return m_fd; }
-
-    int take_fd()
-    {
-        int fd = m_fd;
-        m_fd = -1;
-        return fd;
-    }
-
-private:
-    int m_fd;
-};
-
 class SendQueue : public AtomicRefCounted<SendQueue> {
 public:
     enum class Running {