Add ControllerInterface::Win32 to wrap XInput and DInput

Source/Core/InputCommon/ControllerInterface/Win32/Win32.cpp

@@ -0,0 +1,26 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "InputCommon/ControllerInterface/Win32/Win32.h"
+
+#include "InputCommon/ControllerInterface/DInput/DInput.h"
+#include "InputCommon/ControllerInterface/XInput/XInput.h"
+
+void ciface::Win32::Init()
+{
+  // DInput::Init();
+  XInput::Init();
+}
+
+void ciface::Win32::PopulateDevices(void* hwnd)
+{
+  DInput::PopulateDevices(static_cast<HWND>(hwnd));
+  XInput::PopulateDevices();
+}
+
+void ciface::Win32::DeInit()
+{
+  // DInput::DeInit();
+  XInput::DeInit();
+}