Misc: Post-refactor cleanups

src/util/platform_misc.h

@@ -1,18 +1,20 @@
 // SPDX-FileCopyrightText: 2019-2022 Connor McLaughlin <stenzek@gmail.com>
 // SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
 
-namespace FrontendCommon {
+#include "window_info.h"
+
+#include <optional>
+
+namespace PlatformMisc {
 void SuspendScreensaver();
 void ResumeScreensaver();
 
 /// Abstracts platform-specific code for asynchronously playing a sound.
 /// On Windows, this will use PlaySound(). On Linux, it will shell out to aplay. On MacOS, it uses NSSound.
 bool PlaySoundAsync(const char* path);
+} // namespace PlatformMisc
 
-#ifdef __APPLE__
-/// Add a handler to be run when macOS changes between dark and light themes
-void AddThemeChangeHandler(void* ctx, void(handler)(void* ctx));
-/// Remove a handler previously added using AddThemeChangeHandler with the given context
-void RemoveThemeChangeHandler(void* ctx);
-#endif
-} // namespace FrontendCommon
+namespace Host {
+/// Return the current window handle. Needed for DInput.
+std::optional<WindowInfo> GetTopLevelWindowInfo();
+} // namespace Host