Remove SocketData and now only pass the dart port to epoll.

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 "platform/globals.h"
 #if defined(TARGET_OS_MACOS)
 
 #include "bin/eventhandler.h"
 
 #include <errno.h>  // NOLINT
@@ skipping 390 matching lines @@
   int result =
       dart::Thread::Start(&EventHandlerImplementation::EventHandlerEntry,
                           reinterpret_cast<uword>(handler));
   if (result != 0) {
     FATAL1("Failed to start event handler thread %d", result);
   }
 }
 
 
 void EventHandlerImplementation::Shutdown() {
-  SendData(kShutdownId, 0, 0);
+  Notify(kShutdownId, 0, 0);
 }
 
 
-void EventHandlerImplementation::SendData(intptr_t id,
-                                          Dart_Port dart_port,
-                                          int64_t data) {
+void EventHandlerImplementation::Notify(intptr_t id,
+                                        Dart_Port dart_port,
+                                        int64_t data) {
   WakeupHandler(id, dart_port, data);
 }
 
 
 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);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_MACOS)