GLContext: Runtime selection of EGL/GLX on Linux

Source/Core/Common/GL/GLContext.h

@@ -46,7 +46,8 @@ public:
   // Creates an instance of GLContext specific to the platform we are running on.
   // If successful, the context is made current on the calling thread.
   static std::unique_ptr<GLContext> Create(const WindowSystemInfo& wsi, bool stereo = false,
-                                           bool core = true);
+                                           bool core = true, bool prefer_egl = false,
+                                           bool prefer_gles = false);
 
 protected:
   virtual bool Initialize(void* display_handle, void* window_handle, bool stereo, bool core);