bluetooth: Add characteristics to the device's attribute instance map

third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h

Index: third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h
diff --git a/third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h b/third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h
index 6f6fdaa395f7c1eaec7506a6071569f0962ece4c..eb3fd7196588f1a1253ea9c2b3dd389079426b76 100644
--- a/third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h
+++ b/third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h
@@ -18,11 +18,13 @@
 namespace blink {
 
 class BluetoothAttributeInstanceMap;
+class BluetoothRemoteGATTCharacteristic;
 class BluetoothRemoteGATTServer;
 class BluetoothRemoteGATTService;
 class ScriptPromise;
 class ScriptPromiseResolver;
 
+struct WebBluetoothRemoteGATTCharacteristicInit;
 struct WebBluetoothRemoteGATTService;
 
 // BluetoothDevice represents a physical bluetooth device in the DOM. See IDL.
@@ -50,6 +52,12 @@ class BluetoothDevice final : public EventTargetWithInlineData,
       std::unique_ptr<WebBluetoothRemoteGATTService>);
   bool isValidService(const String& serviceInstanceId);
 
+  BluetoothRemoteGATTCharacteristic*
+  getOrCreateBluetoothRemoteGATTCharacteristic(
+      ExecutionContext*,
+      std::unique_ptr<WebBluetoothRemoteGATTCharacteristicInit>,
+      BluetoothRemoteGATTService*);
+
   // We should disconnect from the device in all of the following cases:
   // 1. When the object gets GarbageCollected e.g. it went out of scope.
   // dispose() is called in this case.