bluetooth: Subscribe to notifications

content/common/bluetooth/bluetooth_messages.h

 // 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.
 
 // Messages for Web Bluetooth API.
 // Multiply-included message file, hence no include guard.
 
 // Web Bluetooth Security
 // The security mechanisms of Bluetooth are described in the specification:
 // https://webbluetoothchrome.github.io/web-bluetooth
@@ skipping 165 matching lines @@
                      int /* thread_id */,
                      int /* request_id */)
 
 // Informs the renderer that an error occurred while writing a value to a
 // characteristic.
 IPC_MESSAGE_CONTROL3(BluetoothMsg_WriteCharacteristicValueError,
                      int /* thread_id */,
                      int /* request_id */,
                      blink::WebBluetoothError /* result */)
 
+// Informs the renderer that the user has successfully subscribed to
+// notifications from the device.
+IPC_MESSAGE_CONTROL2(BluetoothMsg_StartNotificationsSuccess,
+                     int /* thread_id */,
+                     int /* request_id */)
+
+// Informs the renderer that an error ocurred when trying to subscribe to
+// notifications from the device.
+IPC_MESSAGE_CONTROL3(BluetoothMsg_StartNotificationsError,
+                     int /* thread_id */,
+                     int /* request_id */,
+                     blink::WebBluetoothError)
+
+// Informs the renderer that the user has successfully unsubscribed from
+// notifications.
+IPC_MESSAGE_CONTROL2(BluetoothMsg_StopNotificationsSuccess,
+                     int /* thread_id */,
+                     int /* request_id */)
+
 // Messages sent from the renderer to the browser.
 
 // Requests a bluetooth device from the browser.
 IPC_MESSAGE_CONTROL5(BluetoothHostMsg_RequestDevice,
                      int /* thread_id */,
                      int /* request_id */,
                      int /* frame_routing_id */,
                      std::vector<content::BluetoothScanFilter>,
                      std::vector<device::BluetoothUUID> /* optional_services */)
 
@@ skipping 22 matching lines @@
                      int /* thread_id */,
                      int /* request_id */,
                      std::string /* characteristic_instance_id */)
 
 // Writes a value to a bluetooth device's characteristic.
 IPC_MESSAGE_CONTROL4(BluetoothHostMsg_WriteValue,
                      int /* thread_id */,
                      int /* request_id */,
                      std::string /* characteristic_instance_id */,
                      std::vector<uint8_t> /* value */)
+
+// Subscribes to notifications from a device's characteristic.
+IPC_MESSAGE_CONTROL3(BluetoothHostMsg_StartNotifications,
+                     int /* thread_id */,
+                     int /* request_id */,
+                     std::string /* characteristic_instance_id */)
+
+// Unsubscribes from notifications from a device's characteristic.
+IPC_MESSAGE_CONTROL3(BluetoothHostMsg_StopNotifications,
+                     int /* thread_id */,
+                     int /* request_id */,
+                     std::string /* characteristic_instance_id */)