bluetooth: Add characteristicvaluechanged event

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 184 matching lines @@
                      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 */)
 
+// Informs the renderer that a characteristic's value changed.
+IPC_MESSAGE_CONTROL3(BluetoothMsg_CharacteristicValueChanged,
+                     int /* thread_id */,
+                     std::string /* characteristic_instance_id */,
+                     std::vector<uint8_t> /* value */)
+
 // 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 34 matching lines @@
 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 */)
+
+// Register to receive characteristic value changed events.
+IPC_MESSAGE_CONTROL2(BluetoothHostMsg_RegisterCharacteristic,
+                     int /* thread_id */,
+                     std::string /* characteristics_instance_id */)
+
+// Unregister from characteristic value changed events.
+IPC_MESSAGE_CONTROL2(BluetoothHostMsg_UnregisterCharacteristic,
+                     int /* thread_id */,
+                     std::string /* characteristics_instance_id */)