backends/virtual: Use #pragma once

src/backends/virtual/egl_gbm_backend.h

@@ -6,8 +6,8 @@
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
-#ifndef KWIN_EGL_GBM_BACKEND_H
-#define KWIN_EGL_GBM_BACKEND_H
+#pragma once
+
 #include "abstract_egl_backend.h"
 #include "outputlayer.h"
 
@@ -65,6 +65,4 @@ private:
     std::map<Output *, std::unique_ptr<VirtualEglLayer>> m_outputs;
 };
 
-} // namespace
-
-#endif
+} // namespace KWin

src/backends/virtual/scene_qpainter_virtual_backend.h

@@ -6,8 +6,7 @@
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
-#ifndef KWIN_SCENE_QPAINTER_VIRTUAL_BACKEND_H
-#define KWIN_SCENE_QPAINTER_VIRTUAL_BACKEND_H
+#pragma once
 
 #include "outputlayer.h"
 #include "qpainterbackend.h"
@@ -55,6 +54,4 @@ private:
     int m_frameCounter = 0;
 };
 
-}
-
-#endif
+} // namespace KWin

src/backends/virtual/virtual_backend.h

@@ -6,8 +6,7 @@
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
-#ifndef KWIN_VIRTUAL_BACKEND_H
-#define KWIN_VIRTUAL_BACKEND_H
+#pragma once
 
 #include "platform.h"
 
@@ -73,6 +72,4 @@ private:
     std::unique_ptr<Session> m_session;
 };
 
-}
-
-#endif
+} // namespace KWin

src/backends/virtual/virtual_output.h

@@ -6,8 +6,7 @@
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
-#ifndef KWIN_VIRTUAL_OUTPUT_H
-#define KWIN_VIRTUAL_OUTPUT_H
+#pragma once
 
 #include "output.h"
 
@@ -49,6 +48,4 @@ private:
     int m_identifier;
 };
 
-}
-
-#endif
+} // namespace KWin