add fake ppb_flash_fullscreen_get_screen_size returning 1366x768
add reverse_xevent_type()
add tracing info for NPP_HandleEvent()
replace malloc + memset with calloc in ppb_image_data_create()
impl ppb_graphics2d_create()
mitigate warnings in ppb_url_loader_open()
impl ppb_instance_bind_graphics(), partial
impl ppb_graphics2d_replace_contents(), partial
instance will have reference to graphics too
impl ppb_graphics2d_flush()
handle GraphicsExpose event in NPP_HandleEvent()