diff --git a/cros/daemon_chromeos.cc b/cros/daemon_chromeos.cc
new file mode 100644
index 0000000..a7cad8c
--- /dev/null
+++ b/cros/daemon_chromeos.cc
@@ -0,0 +1,82 @@
+//
+// Copyright (C) 2015 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include "update_engine/cros/daemon_chromeos.h"
+
+#include <sysexits.h>
+
+#include <base/bind.h>
+#include <base/location.h>
+
+#include "update_engine/cros/real_system_state.h"
+
+using brillo::Daemon;
+using std::unique_ptr;
+
+namespace chromeos_update_engine {
+
+unique_ptr<DaemonBase> DaemonBase::CreateInstance() {
+  return std::make_unique<DaemonChromeOS>();
+}
+
+int DaemonChromeOS::OnInit() {
+  // Register the |subprocess_| singleton with this Daemon as the signal
+  // handler.
+  subprocess_.Init(this);
+
+  int exit_code = Daemon::OnInit();
+  if (exit_code != EX_OK)
+    return exit_code;
+
+  // Initialize update engine global state but continue if something fails.
+  // TODO(deymo): Move the daemon_state_ initialization to a factory method
+  // avoiding the explicit re-usage of the |bus| instance, shared between
+  // D-Bus service and D-Bus client calls.
+  RealSystemState* real_system_state = new RealSystemState();
+  daemon_state_.reset(real_system_state);
+  LOG_IF(ERROR, !real_system_state->Initialize())
+      << "Failed to initialize system state.";
+
+  // Create the DBus service.
+  dbus_adaptor_.reset(new UpdateEngineAdaptor(real_system_state));
+  daemon_state_->AddObserver(dbus_adaptor_.get());
+
+  dbus_adaptor_->RegisterAsync(
+      base::Bind(&DaemonChromeOS::OnDBusRegistered, base::Unretained(this)));
+  LOG(INFO) << "Waiting for DBus object to be registered.";
+  return EX_OK;
+}
+
+void DaemonChromeOS::OnDBusRegistered(bool succeeded) {
+  if (!succeeded) {
+    LOG(ERROR) << "Registering the UpdateEngineAdaptor";
+    QuitWithExitCode(1);
+    return;
+  }
+
+  // Take ownership of the service now that everything is initialized. We need
+  // to this now and not before to avoid exposing a well known DBus service
+  // path that doesn't have the service it is supposed to implement.
+  if (!dbus_adaptor_->RequestOwnership()) {
+    LOG(ERROR) << "Unable to take ownership of the DBus service, is there "
+               << "other update_engine daemon running?";
+    QuitWithExitCode(1);
+    return;
+  }
+  daemon_state_->StartUpdater();
+}
+
+}  // namespace chromeos_update_engine