GL: Fix window resize not applying under Wayland

src/common/gl/context_egl_wayland.h

@@ -1,5 +1,6 @@
 #pragma once
 #include "context_egl.h"
+#include <wayland-egl.h>
 
 namespace GL {
 
@@ -13,9 +14,13 @@ public:
                                          size_t num_versions_to_try);
 
   std::unique_ptr<Context> CreateSharedContext(const WindowInfo& wi) override;
+  void ResizeSurface(u32 new_surface_width = 0, u32 new_surface_height = 0) override;
 
 protected:
   EGLNativeWindowType GetNativeWindow(EGLConfig config) override;
+
+private:
+  wl_egl_window* m_wl_window = nullptr;
 };
 
 } // namespace GL