Revert "Better error-message when bind fails."

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 BIN_SOCKET_H_
 #define BIN_SOCKET_H_
 
 #if defined(DART_IO_DISABLED)
 #error "socket.h can only be included on builds with IO enabled"
 #endif
@@ skipping 260 matching lines @@
       intptr_t fd, const void* buffer, intptr_t num_bytes, const RawAddr& addr);
   static intptr_t RecvFrom(
       intptr_t fd, void* buffer, intptr_t num_bytes, RawAddr* addr);
   // Creates a socket which is bound and connected. The port to connect to is
   // specified as the port component of the passed RawAddr structure.
   static intptr_t CreateConnect(const RawAddr& addr);
   // Creates a socket which is bound and connected. The port to connect to is
   // specified as the port component of the passed RawAddr structure.
   static intptr_t CreateBindConnect(const RawAddr& addr,
                                     const RawAddr& source_addr);
-  // Returns true if the given error-number is because the system was not able
-  // to bind the socket to a specific IP.
-  static bool IsBindError(intptr_t error_number);
   // Creates a datagram socket which is bound. The port to bind
   // to is specified as the port component of the RawAddr structure.
   static intptr_t CreateBindDatagram(const RawAddr& addr, bool reuseAddress);
   static intptr_t GetPort(intptr_t fd);
   static SocketAddress* GetRemotePeer(intptr_t fd, intptr_t* port);
   static void GetError(intptr_t fd, OSError* os_error);
   static int GetType(intptr_t fd);
   static intptr_t GetStdioHandle(intptr_t num);
   static void Close(intptr_t fd);
   static bool GetNoDelay(intptr_t fd, bool* enabled);
@@ skipping 150 matching lines @@
   typedef std::map<intptr_t, OSSocket*>::iterator SocketsIterator;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ListeningSocketRegistry);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_SOCKET_H_