[cairo] Cache data in Cairo

[Super Su]

Hi,
I use Cairo lib in WebKit project. I find there are some cache data in Cairo lib. And I don't know how to free them before exit from WebKit.
There is an API cairo_debug_reset_static_data() which could reset all the data. But it's a debug API. Do you know any other API which could replace the debug API?

Thanks
Super Su


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