void webkit_memory_pressure_settings_set_conservative_threshold ( WebKitMemoryPressureSettings* settings, gdouble value )
Sets the memory limit for the conservative policy to start working.
value as the fraction of the defined memory limit where the conservative
policy starts working. This policy will try to reduce the memory footprint by
releasing non critical memory.
The threshold must be bigger than 0 and smaller than 1, and it must be smaller
than the strict threshold defined in
settings. The default value is 0.33.