normalize common filenames in VideoBackends/Null

Source/Core/VideoBackends/Null/NullVertexManager.h

@@ -0,0 +1,20 @@
+// Copyright 2015 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "VideoCommon/VertexManagerBase.h"
+
+namespace Null
+{
+class VertexManager final : public VertexManagerBase
+{
+public:
+  VertexManager();
+  ~VertexManager() override;
+
+protected:
+  void DrawCurrentBatch(u32 base_index, u32 num_indices, u32 base_vertex) override;
+};
+}  // namespace Null