setReadOffset     387 Source/platform/image-decoders/png/PNGImageDecoder.cpp         m_reader->setReadOffset(m_reader->currentBufferSize() - png_process_data_pause(png, 0));
setReadOffset     389 Source/platform/image-decoders/png/PNGImageDecoder.cpp         m_reader->setReadOffset(m_reader->currentBufferSize() - png->buffer_size);