diff --git a/libcros_proxy.cc b/libcros_proxy.cc
new file mode 100644
index 0000000..9f76ea9
--- /dev/null
+++ b/libcros_proxy.cc
@@ -0,0 +1,47 @@
+// Copyright 2015 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "update_engine/libcros_proxy.h"
+
+#include "update_engine/dbus_proxies.h"
+
+using org::chromium::LibCrosServiceInterfaceProxy;
+using org::chromium::LibCrosServiceInterfaceProxyInterface;
+using org::chromium::UpdateEngineLibcrosProxyResolvedInterfaceProxy;
+using org::chromium::UpdateEngineLibcrosProxyResolvedInterfaceProxyInterface;
+
+namespace {
+const char kLibCrosServiceName[] = "org.chromium.LibCrosService";
+}  // namespace
+
+namespace chromeos_update_engine {
+
+LibCrosProxy::LibCrosProxy(
+    std::unique_ptr<LibCrosServiceInterfaceProxyInterface>
+        service_interface_proxy,
+    std::unique_ptr<UpdateEngineLibcrosProxyResolvedInterfaceProxyInterface>
+        ue_proxy_resolved_interface)
+    : service_interface_proxy_(std::move(service_interface_proxy)),
+      ue_proxy_resolved_interface_(std::move(ue_proxy_resolved_interface)) {
+}
+
+LibCrosProxy::LibCrosProxy(const scoped_refptr<dbus::Bus>& bus)
+    : service_interface_proxy_(
+          new LibCrosServiceInterfaceProxy(bus, kLibCrosServiceName)),
+      ue_proxy_resolved_interface_(
+          new UpdateEngineLibcrosProxyResolvedInterfaceProxy(
+              bus,
+              kLibCrosServiceName)) {
+}
+
+LibCrosServiceInterfaceProxyInterface* LibCrosProxy::service_interface_proxy() {
+  return service_interface_proxy_.get();
+}
+
+UpdateEngineLibcrosProxyResolvedInterfaceProxyInterface*
+LibCrosProxy::ue_proxy_resolved_interface() {
+  return ue_proxy_resolved_interface_.get();
+}
+
+}  // namespace chromeos_update_engine