[webkit-help] How does ImageDecoder free the encoded data

[hap 497]

Hi,

In the ImageDecoder.h, it has an attribute "RefPtr<SharedBuffer>
m_data;" which save teh encoded data (according to the comment).
My question is when does that SharedBuffer get free? I have search the
code in ImageDeocder and its child classes,
I don't see anywhere that buffer is getting free.  Can someone please
give me some pointers?

Thank you.