REVERT of nanoui/chemistry becoming subsystems (temp)

code/controllers/Processes/chemistry.dm

@@ -0,0 +1,33 @@
+var/datum/controller/process/chemistry/chemistryProcess
+
+/datum/controller/process/chemistry
+	var/list/active_holders
+	var/list/chemical_reactions
+	var/list/chemical_reagents
+
+/datum/controller/process/chemistry/setup()
+	name = "chemistry"
+	schedule_interval = 20 // every 2 seconds
+	chemistryProcess = src
+	active_holders = list()
+	chemical_reactions = chemical_reactions_list
+	chemical_reagents = chemical_reagents_list
+
+/datum/controller/process/chemistry/statProcess()
+	..()
+	stat(null, "[active_holders.len] reagent holder\s")
+
+/datum/controller/process/chemistry/doWork()
+	for(last_object in active_holders)
+		var/datum/reagents/holder = last_object
+		if(!holder.process_reactions())
+			active_holders -= holder
+		SCHECK
+
+/datum/controller/process/chemistry/proc/mark_for_update(var/datum/reagents/holder)
+	if(holder in active_holders)
+		return
+
+	//Process once, right away. If we still need to continue then add to the active_holders list and continue later
+	if(holder.process_reactions())
+		active_holders += holder

code/controllers/Processes/nanoui.dm

@@ -0,0 +1,19 @@
+/datum/controller/process/nanoui/setup()
+	name = "nanoui"
+	schedule_interval = 20 // every 2 seconds
+
+/datum/controller/process/nanoui/statProcess()
+	..()
+	stat(null, "[GLOB.nanomanager.processing_uis.len] UIs")
+
+/datum/controller/process/nanoui/doWork()
+	for(last_object in GLOB.nanomanager.processing_uis)
+		var/datum/nanoui/NUI = last_object
+		if(istype(NUI) && !QDELETED(NUI))
+			try
+				NUI.process()
+			catch(var/exception/e)
+				catchException(e, NUI)
+		else
+			catchBadType(NUI)
+			GLOB.nanomanager.processing_uis -= NUI