ui: Cleanup class/struct forward declarations

device/bluetooth/bluetooth_remote_gatt_characteristic_android.cc

Index: device/bluetooth/bluetooth_remote_gatt_characteristic_android.cc
diff --git a/device/bluetooth/bluetooth_remote_gatt_characteristic_android.cc b/device/bluetooth/bluetooth_remote_gatt_characteristic_android.cc
index ecab337479bf4658154ba0e97f6fd2e909b9422d..d40c0066584448ba65a61e67aab176efba12cb88 100644
--- a/device/bluetooth/bluetooth_remote_gatt_characteristic_android.cc
+++ b/device/bluetooth/bluetooth_remote_gatt_characteristic_android.cc
@@ -54,6 +54,15 @@ BluetoothRemoteGattCharacteristicAndroid::
     ~BluetoothRemoteGattCharacteristicAndroid() {
   Java_ChromeBluetoothRemoteGattCharacteristic_onBluetoothRemoteGattCharacteristicAndroidDestruction(
       AttachCurrentThread(), j_characteristic_);
+  if (!read_callback_.is_null()) {
+    DCHECK(!read_error_callback_.is_null());
+    read_error_callback_.Run(BluetoothGattService::GATT_ERROR_FAILED);
+  }
+
+  if (!write_callback_.is_null()) {
+    DCHECK(!write_error_callback_.is_null());
+    write_error_callback_.Run(BluetoothGattService::GATT_ERROR_FAILED);
+  }
 }
 
 // static