bluetooth: Standardize Bluetooth adapter access in Adapter service.

device/bluetooth/adapter_factory.cc

+// Copyright 2016 The Chromium 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 <utility>
+
+#include "base/memory/ptr_util.h"
+#include "device/bluetooth/adapter.h"
+#include "device/bluetooth/adapter_factory.h"
+#include "device/bluetooth/bluetooth_adapter_factory.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+
+namespace bluetooth {
+
+AdapterFactory::AdapterFactory() : weak_ptr_factory_(this) {}
+AdapterFactory::~AdapterFactory() {}
+
+// static
+void AdapterFactory::Create(mojom::AdapterFactoryRequest request) {
+  mojo::MakeStrongBinding(base::MakeUnique<AdapterFactory>(),
+                          std::move(request));
+}
+
+void AdapterFactory::GetAdapter(const GetAdapterCallback& callback) {
+  if (device::BluetoothAdapterFactory::IsBluetoothAdapterAvailable()) {
+    device::BluetoothAdapterFactory::GetAdapter(
+        base::Bind(&AdapterFactory::OnGetAdapter,
+                   weak_ptr_factory_.GetWeakPtr(), callback));
+  } else {
+    callback.Run(nullptr /* AdapterPtr */);
+  }
+}
+
+void AdapterFactory::OnGetAdapter(
+    const GetAdapterCallback& callback,
+    scoped_refptr<device::BluetoothAdapter> adapter) {
+  mojom::AdapterPtr adapter_ptr;
+  mojo::MakeStrongBinding(base::MakeUnique<Adapter>(adapter),
+                          mojo::GetProxy(&adapter_ptr));
+  callback.Run(std::move(adapter_ptr));
+}
+
+}  // namespace bluetooth