Route platform frame hooks through services

src/platform_legacy/legacy_platform_services.cpp

@@ -13,6 +13,7 @@ bool android_set_clipboard(const std::string& s);
 #elif __APPLE__
 #elif __LINUX__
 #include <tinyfiledialogs.h>
+void linux_update_fps(int frames);
 #elif __WEB__
 void webgl_pick_file(std::function<void(std::string)> callback);
 void webgl_pick_file_save(
@@ -87,6 +88,20 @@ public:
 #endif
     }
 
+    void update_platform_frame(float delta_time_seconds) override
+    {
+        (void)delta_time_seconds;
+    }
+
+    void report_rendered_frames(int frames) override
+    {
+#ifdef __LINUX__
+        linux_update_fps(frames);
+#else
+        (void)frames;
+#endif
+    }
+
     void pick_image(pp::platform::PickedPathCallback callback) override
     {
 #ifdef __IOS__