Issue 4353 - Remove deprecated __proto__ syntax

chrome/content/tests/filterClasses.js

 (function()
 {
   module("Filter classes", {setup: prepareFilterComponents, teardown: restoreFilterComponents});
 
   function serializeFilter(filter)
   {
     // Filter serialization only writes out essential properties, need to do a full serialization here
     let result = [];
     result.push("text=" + filter.text);
     if (filter instanceof InvalidFilter)
@@ skipping 124 matching lines @@
       postInit(filter)
     let result = serializeFilter(filter);
     equal(result.sort().join("\n"), expected.sort().join("\n"), text);
 
     // Test round-trip
     let filter2;
     let buffer = [];
     filter.serialize(buffer);
     if (buffer.length)
     {
-      let map = {__proto__: null};
+      let map = Object.create(null);
       for (let line of buffer.slice(1))
       {
         if (/(.*?)=(.*)/.test(line))
           map[RegExp.$1] = RegExp.$2;
       }
       filter2 = Filter.fromObject(map);
     }
     else
     {
       filter2 = Filter.fromText(filter.text);
@@ skipping 154 matching lines @@
     compareFilter("foo.com,~bar.com##[-abp-properties='abc']", ["type=cssrule", "text=foo.com,~bar.com##[-abp-properties='abc']", "selectorDomain=foo.com", "selector=[-abp-properties='abc']", "domains=FOO.COM|~BAR.COM", "regexp=abc"]);
     compareFilter("foo.com,~bar##[-abp-properties='abc']", ["type=cssrule", "text=foo.com,~bar##[-abp-properties='abc']", "selectorDomain=foo.com", "selector=[-abp-properties='abc']", "domains=FOO.COM|~BAR", "regexp=abc"]);
     compareFilter("~foo.com,bar.com##[-abp-properties='abc']", ["type=cssrule", "text=~foo.com,bar.com##[-abp-properties='abc']", "selectorDomain=bar.com", "selector=[-abp-properties='abc']", "domains=BAR.COM|~FOO.COM", "regexp=abc"]);
 
     compareFilter("##[-abp-properties='']", ["type=elemhide", "text=##[-abp-properties='']", "selector=[-abp-properties='']"]);
     compareFilter("foo.com#@#[-abp-properties='abc']", ["type=elemhideexception", "text=foo.com#@#[-abp-properties='abc']", "selectorDomain=foo.com", "selector=[-abp-properties='abc']", "domains=FOO.COM"]);
     compareFilter("foo.com##aaa [-abp-properties='abc'] bbb", ["type=cssrule", "text=foo.com##aaa [-abp-properties='abc'] bbb", "selectorDomain=foo.com", "selector=aaa [-abp-properties='abc'] bbb", "domains=FOO.COM", "prefix=aaa ", "regexp=abc", "suffix= bbb"]);
     compareFilter("foo.com##[-abp-properties='|background-image: url(data:*)']", ["type=cssrule", "text=foo.com##[-abp-properties='|background-image: url(data:*)']", "selectorDomain=foo.com", "selector=[-abp-properties='|background-image: url(data:*)']", "domains=FOO.COM", "regexp=^background\\-image\\:\\ url\\(data\\:.*\\)"]);
   });
 })();