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-rw-r--r--device/usb/usb_service_impl.cc3
1 files changed, 2 insertions, 1 deletions
diff --git a/device/usb/usb_service_impl.cc b/device/usb/usb_service_impl.cc
index 5b4d503..89fbd66a 100644
--- a/device/usb/usb_service_impl.cc
+++ b/device/usb/usb_service_impl.cc
@@ -106,7 +106,8 @@ class UsbServiceImpl : public UsbService,
// device change notification window messages. It registers for notifications
// regarding devices implementating the "UsbDevice" interface, which represents
// most of the devices the UsbService will enumerate.
-class UsbServiceImpl::UIThreadHelper : DeviceMonitorWin::Observer {
+class UsbServiceImpl::UIThreadHelper final
+ : private DeviceMonitorWin::Observer {
public:
UIThreadHelper(base::WeakPtr<UsbServiceImpl> usb_service)
: task_runner_(base::ThreadTaskRunnerHandle::Get()),