Migrate chrome.bluetooth API backend to use device::BluetoothDiscoverySession.

device/bluetooth/test/mock_bluetooth_discovery_session.cc

Index: device/bluetooth/test/mock_bluetooth_discovery_session.cc
diff --git a/device/bluetooth/test/mock_bluetooth_discovery_session.cc b/device/bluetooth/test/mock_bluetooth_discovery_session.cc
new file mode 100644
index 0000000000000000000000000000000000000000..72449ee9767de49656cbae5f13dec3e4f742878e
--- /dev/null
+++ b/device/bluetooth/test/mock_bluetooth_discovery_session.cc
@@ -0,0 +1,14 @@
+// Copyright 2014 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 "device/bluetooth/test/mock_bluetooth_discovery_session.h"
+
+#include "device/bluetooth/bluetooth_adapter.h"
+
+namespace device {
+
+MockBluetoothDiscoverySession::MockBluetoothDiscoverySession() {}
+MockBluetoothDiscoverySession::~MockBluetoothDiscoverySession() {}
+
+}  // namespace device