[dart:io] Don't close stdin with a socket finalizer

runtime/bin/socket.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_BIN_SOCKET_H_
 #define RUNTIME_BIN_SOCKET_H_
 
 #if defined(DART_IO_DISABLED)
 #error "socket.h can only be included on builds with IO enabled"
 #endif
@@ skipping 242 matching lines @@
 // deallocated either from the finalizer attached to _NativeSockets there, or
 // from the eventhandler, whichever drops the last reference.
 class Socket : public ReferenceCounted<Socket> {
  public:
   enum SocketRequest {
     kLookupRequest = 0,
     kListInterfacesRequest = 1,
     kReverseLookupRequest = 2,
   };
 
+  enum SocketFinalizer {
+    kFinalizerNormal,
+    kFinalizerListening,
+    kFinalizerStdio,
+  };
+
   explicit Socket(intptr_t fd);
 
   intptr_t fd() const { return fd_; }
   void SetClosedFd();
 
   Dart_Port port() const { return port_; }
   void set_port(Dart_Port port) { port_ = port; }
 
   // TODO(dart:io): Convert these to instance methods where possible.
   static bool Initialize();
@@ skipping 69 matching lines @@
       OSError** os_error);
 
   static CObject* LookupRequest(const CObjectArray& request);
   static CObject* ListInterfacesRequest(const CObjectArray& request);
   static CObject* ReverseLookupRequest(const CObjectArray& request);
 
   static Dart_Port GetServicePort();
 
   static void SetSocketIdNativeField(Dart_Handle handle,
                                      intptr_t id,
-                                     bool listening);
+                                     SocketFinalizer finalizer);
   static void ReuseSocketIdNativeField(Dart_Handle handle,
                                        Socket* socket,
-                                       bool listening);
+                                       SocketFinalizer finalizer);
   static Socket* GetSocketIdNativeField(Dart_Handle socket);
 
  private:
   ~Socket() { ASSERT(fd_ == kClosedFd); }
 
   static const int kClosedFd = -1;
 
   intptr_t fd_;
   Dart_Port port_;
 
@@ skipping 137 matching lines @@
 
   Mutex* mutex_;
 
   DISALLOW_COPY_AND_ASSIGN(ListeningSocketRegistry);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // RUNTIME_BIN_SOCKET_H_