Implement DBus changes needed for notifications.

device/bluetooth/dbus/bluetooth_gatt_characteristic_service_provider_impl.h

Index: device/bluetooth/dbus/bluetooth_gatt_characteristic_service_provider_impl.h
diff --git a/device/bluetooth/dbus/bluetooth_gatt_characteristic_service_provider_impl.h b/device/bluetooth/dbus/bluetooth_gatt_characteristic_service_provider_impl.h
index 251fc2ad003c9c17c466a93daee9ae35fe72fdde..608b515aac6b830102cb423d62d158463d364dc3 100644
--- a/device/bluetooth/dbus/bluetooth_gatt_characteristic_service_provider_impl.h
+++ b/device/bluetooth/dbus/bluetooth_gatt_characteristic_service_provider_impl.h
@@ -27,6 +27,7 @@ namespace bluez {
 class DEVICE_BLUETOOTH_EXPORT BluetoothGattCharacteristicServiceProviderImpl
     : public BluetoothGattCharacteristicServiceProvider {
  public:
+  // Use nullptr for |bus| to create for testing.
   BluetoothGattCharacteristicServiceProviderImpl(
       dbus::Bus* bus,
       const dbus::ObjectPath& object_path,
@@ -69,6 +70,16 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothGattCharacteristicServiceProviderImpl
   void WriteValue(dbus::MethodCall* method_call,
                   dbus::ExportedObject::ResponseSender response_sender);
 
+  // Called by BlueZ when a remote central is requesting to start a
+  // notification session for this characteristic.
+  void StartNotify(dbus::MethodCall* method_call,
+                   dbus::ExportedObject::ResponseSender response_sender);
+
+  // Called by BlueZ when a remote central is requesting to stop any existing
+  // notification session for this characteristic.
+  void StopNotify(dbus::MethodCall* method_call,
+                  dbus::ExportedObject::ResponseSender response_sender);
+
   // Called by dbus:: when a method is exported.
   void OnExported(const std::string& interface_name,
                   const std::string& method_name,