Implement debugger connection on Windows.

runtime/bin/dbg_connection_macos.cc

 // Copyright (c) 2012, 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.
 
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/event.h>
 #include <unistd.h>
@@ skipping 139 matching lines @@
 
 void DebuggerConnectionImpl::StartHandler(int port_number) {
   ASSERT(DebuggerConnectionHandler::listener_fd_ != -1);
   SetupPollQueue();
   int result =
       dart::Thread::Start(&DebuggerConnectionImpl::Handler, 0);
   if (result != 0) {
     FATAL1("Failed to start debugger connection handler thread: %d\n", result);
   }
 }
+
+
+intptr_t DebuggerConnectionImpl::Send(intptr_t socket,
+                                      const char* buf,
+                                      int len) {
+  return TEMP_FAILURE_RETRY(write(socket, buf, len));
+}
+
+
+intptr_t DebuggerConnectionImpl::Receive(intptr_t socket, char* buf, int len) {
+  return TEMP_FAILURE_RETRY(read(socket, buf, len));
+}