Revert of Revert of Add CPP API for BLE advertisments.

device/bluetooth/bluetooth_adapter_chromeos.h

Index: device/bluetooth/bluetooth_adapter_chromeos.h
diff --git a/device/bluetooth/bluetooth_adapter_chromeos.h b/device/bluetooth/bluetooth_adapter_chromeos.h
index 7b17f5380e5fdac646a87cb467acf4b5db1a15d2..1811287ada8a32296f05095f7623608cacc8443e 100644
--- a/device/bluetooth/bluetooth_adapter_chromeos.h
+++ b/device/bluetooth/bluetooth_adapter_chromeos.h
@@ -96,6 +96,11 @@
       const device::BluetoothAdapter::AcquiredCallback& callback,
       const device::BluetoothAudioSink::ErrorCallback& error_callback) override;
 
+  void RegisterAdvertisement(
+      scoped_ptr<device::BluetoothAdvertisement::Data> advertisement_data,
+      const CreateAdvertisementCallback& callback,
+      const CreateAdvertisementErrorCallback& error_callback) override;
+
   // Locates the device object by object path (the devices map and
   // BluetoothDevice methods are by address).
   BluetoothDeviceChromeOS* GetDeviceWithPath(