Add CPP API for BLE advertisments.

device/bluetooth/bluetooth_adapter_unittest.cc

Index: device/bluetooth/bluetooth_adapter_unittest.cc
diff --git a/device/bluetooth/bluetooth_adapter_unittest.cc b/device/bluetooth/bluetooth_adapter_unittest.cc
index 81e2dcbfdad263c7e8a24db571fd214e4a956929..21d7f0db3a964d13c05b03e0d1b1f4a1c293a61c 100644
--- a/device/bluetooth/bluetooth_adapter_unittest.cc
+++ b/device/bluetooth/bluetooth_adapter_unittest.cc
@@ -77,6 +77,11 @@ class TestBluetoothAdapter : public BluetoothAdapter {
       const AcquiredCallback& callback,
       const BluetoothAudioSink::ErrorCallback& error_callback) override {}
 
+  void RegisterAdvertisement(
+      scoped_ptr<BluetoothAdvertisement::Data> advertisement_data,
+      const CreateAdvertisementCallback& callback,
+      const CreateAdvertisementErrorCallback& error_callback) override {}
+
   void TestErrorCallback() {}
 
   ScopedVector<BluetoothDiscoverySession> discovery_sessions_;