std::map<RendererFrameManagerClient*, size_t> locked_frames_;
std::list<RendererFrameManagerClient*> unlocked_frames_;
size_t max_number_of_saved_frames_;
std::map<RendererFrameManagerClient*, size_t> locked_frames_;
std::list<RendererFrameManagerClient*> unlocked_frames_;
size_t max_number_of_saved_frames_;