Add missing files from previous commit

runtime/bin/native_service.cc

+// 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.
+
+#include "bin/native_service.h"
+
+#include "platform/globals.h"
+#include "bin/thread.h"
+
+
+NativeService::NativeService(const char* name,
+                             Dart_NativeMessageHandler handler,
+                             int number_of_ports)
+    : name_(name),
+      handler_(handler),
+      service_ports_size_(number_of_ports),
+      service_ports_index_(0) {
+  service_ports_ = new Dart_Port[service_ports_size_];
+  for (int i = 0; i < service_ports_size_; i++) {
+    service_ports_[i] = ILLEGAL_PORT;
+  }
+}
+
+
+NativeService::~NativeService() {
+  delete[] service_ports_;
+}
+
+
+Dart_Port NativeService::GetServicePort() {
+  MutexLocker lock(&mutex_);
+  Dart_Port result = service_ports_[service_ports_index_];
+  if (result == ILLEGAL_PORT) {
+    result = Dart_NewNativePort(name_, handler_, true);
+    ASSERT(result != ILLEGAL_PORT);
+    service_ports_[service_ports_index_] = result;
+  }
+  service_ports_index_ = (service_ports_index_ + 1) % service_ports_size_;
+  return result;
+}