Issue 4353 - Remove non standard for each syntax

utils/jstypes.js

 /**
  * This file presents various methods to create a JS typing system.
  */
 
 function divine_inheritance(clazz, constants) {
   let aliases = {};
-  for each (let c in constants) {
+  for (let c of constants) {
     aliases[c.name] = c.init;
   }
 
   // First, do we have a QueryInterface variable?
   if ("QueryInterface" in clazz.variables) {
     // Yes, it's a function, but the variable means that we found a XPCOMUtils
     // utility. This'll be easy!
     let xpcom = clazz.variables.QueryInterface.init;
     assert(xpcom.op == JSOP_CALL && xpcom.kids[0].atom == "generateQI");
 
     if (!clazz.inherits)
       clazz.inherits = [];
-    for each (let iface in xpcom.kids[1].kids)
+    for (let iface of xpcom.kids[1].kids)
       clazz.inherits.push(iface.atom);
     return;
   }
-  
+
   if ("QueryInterface" in clazz.functions) {
     if (!clazz.inherits)
       clazz.inherits = [];
     function findInterfaces(ast) {
-            if (ast.op == JSOP_GETPROP && ast.kids[0]) {
-                    let check = ast.kids[0];
-                    if (check.atom == "interfaces" && check.kids[0] &&
-                                check.kids[0].atom == "Components") {
+      if (ast.op == JSOP_GETPROP && ast.kids[0]) {
+        let check = ast.kids[0];
+        if (check.atom == "interfaces" && check.kids[0] &&
+            check.kids[0].atom == "Components") {
           clazz.inherits.push(ast.atom);
         }
       }
     }
     visit(clazz.functions.QueryInterface.body, findInterfaces, aliases);
     return;
   }
 }