upload android base code part6

android/system/update_engine/client_library/client.cc

@@ -0,0 +1,46 @@
+//
+// 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/client_library/include/update_engine/client.h"
+
+#include <memory>
+
+#if USE_BINDER
+#include "update_engine/client_library/client_binder.h"
+#else  // !USE_BINDER
+#include "update_engine/client_library/client_dbus.h"
+#endif  // USE_BINDER
+
+using std::unique_ptr;
+
+namespace update_engine {
+
+unique_ptr<UpdateEngineClient> UpdateEngineClient::CreateInstance() {
+#if USE_BINDER
+  auto update_engine_client_impl = new internal::BinderUpdateEngineClient{};
+#else  // !USE_BINDER
+  auto update_engine_client_impl = new internal::DBusUpdateEngineClient{};
+#endif  // USE_BINDER
+  auto ret = unique_ptr<UpdateEngineClient>{update_engine_client_impl};
+
+  if (!update_engine_client_impl->Init()) {
+      ret.reset();
+  }
+
+  return ret;
+}
+
+}  // namespace update_engine