Enable clang style plugin in webrtc/modules/desktop_capture

webrtc/modules/desktop_capture/window_capturer_x11.cc

Index: webrtc/modules/desktop_capture/window_capturer_x11.cc
diff --git a/webrtc/modules/desktop_capture/window_capturer_x11.cc b/webrtc/modules/desktop_capture/window_capturer_x11.cc
index e4a0917b9063dfd89a87eb906660d7d83040e409..18aa5cb29ae6e570470021c29e292ee2040919fc 100644
--- a/webrtc/modules/desktop_capture/window_capturer_x11.cc
+++ b/webrtc/modules/desktop_capture/window_capturer_x11.cc
@@ -86,7 +86,7 @@ class WindowCapturerLinux : public WindowCapturer,
                             public SharedXDisplay::XEventHandler {
  public:
   WindowCapturerLinux(const DesktopCaptureOptions& options);
-  virtual ~WindowCapturerLinux();
+  ~WindowCapturerLinux() override;
 
   // WindowCapturer interface.
   bool GetWindowList(WindowList* windows) override;