bluetooth: Add characteristicvaluechanged event

content/common/bluetooth/bluetooth_messages.h

Index: content/common/bluetooth/bluetooth_messages.h
diff --git a/content/common/bluetooth/bluetooth_messages.h b/content/common/bluetooth/bluetooth_messages.h
index e0e8b543279fa041811c758e270286d1e701015c..30e4942bb2cff41a0088c19f1bcf425ac08f2b84 100644
--- a/content/common/bluetooth/bluetooth_messages.h
+++ b/content/common/bluetooth/bluetooth_messages.h
@@ -202,6 +202,12 @@ 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.
@@ -256,3 +262,13 @@ 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 */)