Fix Windows and Mac OS builds

runtime/bin/eventhandler_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 "bin/eventhandler.h"
 
 #include <errno.h>
 #include <poll.h>
 #include <pthread.h>
 #include <stdio.h>
@@ skipping 292 matching lines @@
       * The fd is unregistered. It gets re-registered when the request
       * was handled by dart.
       */
       intptr_t event_mask = GetPollEvents(&pollfds[i]);
       if (event_mask != 0) {
         intptr_t fd = pollfds[i].fd;
         SocketData* sd = GetSocketData(fd);
         Dart_Port port = sd->port();
         ASSERT(port != 0);
         sd->Unregister();
-        DartUtils::PostInteger(port, event_mask);
+        DartUtils::PostInt32(port, event_mask);
       }
     }
   }
   HandleInterruptFd();
 }
 
 
 intptr_t EventHandlerImplementation::GetTimeout() {
   if (timeout_ == kInfinityTimeout) {
     return kInfinityTimeout;
@@ skipping 58 matching lines @@
 void* EventHandlerImplementation::GetHashmapKeyFromFd(intptr_t fd) {
   // The hashmap does not support keys with value 0.
   return reinterpret_cast<void*>(fd + 1);
 }
 
 
 uint32_t EventHandlerImplementation::GetHashmapHashFromFd(intptr_t fd) {
   // The hashmap does not support keys with value 0.
   return dart::Utils::WordHash(fd + 1);
 }