# HG changeset patch
# User Till Schneidereit <till@tillschneidereit.net>
# Date 1451909215 -3600
#      Mon Jan 04 13:06:55 2016 +0100
# Node ID 5f95feb0d56d6f0d26ea9d33447ab443f4002d5f
# Parent  f21b9347d2f58942a3ff33532251a6030639f0c6
Bug 1101817 - Part 3: Remove WeakMap.prototype.clear usages from Addons SDK

diff --git a/addon-sdk/source/lib/sdk/lang/weak-set.js b/addon-sdk/source/lib/sdk/lang/weak-set.js
--- a/addon-sdk/source/lib/sdk/lang/weak-set.js
+++ b/addon-sdk/source/lib/sdk/lang/weak-set.js
@@ -8,26 +8,31 @@ module.metadata = {
 
 "use strict";
 
 const { Cu } = require("chrome");
 
 function makeGetterFor(Type) {
   let cache = new WeakMap();
 
-  return function getFor(target) {
-    if (!cache.has(target))
-      cache.set(target, new Type());
+  return {
+    getFor(target) {
+      if (!cache.has(target))
+        cache.set(target, new Type());
 
-    return cache.get(target);
+      return cache.get(target);
+    },
+    clearFor(target) {
+      return cache.delete(target)
+    }
   }
 }
 
-var getLookupFor = makeGetterFor(WeakMap);
-var getRefsFor = makeGetterFor(Set);
+var {getFor: getLookupFor, clearFor: clearLookupFor} = makeGetterFor(WeakMap);
+var {getFor: getRefsFor, clearFor: clearRefsFor} = makeGetterFor(Set);
 
 function add(target, value) {
   if (has(target, value))
     return;
 
   getLookupFor(target).set(value, true);
   getRefsFor(target).add(Cu.getWeakReference(value));
 }
@@ -39,18 +44,18 @@ function remove(target, value) {
 exports.remove = remove;
 
 function has(target, value) {
   return getLookupFor(target).has(value);
 }
 exports.has = has;
 
 function clear(target) {
-  getLookupFor(target).clear();
-  getRefsFor(target).clear();
+  clearLookupFor(target);
+  clearRefsFor(target);
 }
 exports.clear = clear;
 
 function iterator(target) {
   let refs = getRefsFor(target);
 
   for (let ref of refs) {
     let value = ref.get();