Issue 4353 - Remove deprecated __proto__ syntax

lib/filterClasses.js

Index: lib/filterClasses.js
diff --git a/lib/filterClasses.js b/lib/filterClasses.js
index 5a8ac6d77bf116ace79ceebbbf3df1b02dc11fc6..ddf9aff8ec82a7e1abdb8f81465bc53af9acb881 100644
--- a/lib/filterClasses.js
+++ b/lib/filterClasses.js
@@ -20,6 +20,7 @@
  */
 
 let {FilterNotifier} = require("filterNotifier");
+let {extend} = require("coreUtils");
 
 /**
  * Abstract base class for filters
@@ -210,10 +211,7 @@ function InvalidFilter(text, reason)
 }
 exports.InvalidFilter = InvalidFilter;
 
-InvalidFilter.prototype =
-{
-  __proto__: Filter.prototype,
-
+InvalidFilter.prototype = extend(Filter, {
   type: "invalid",
 
   /**
@@ -226,7 +224,7 @@ InvalidFilter.prototype =
    * See Filter.serialize()
    */
   serialize: function(buffer) {}
-};
+});
 
 /**
  * Class for comments
@@ -240,17 +238,14 @@ function CommentFilter(text)
 }
 exports.CommentFilter = CommentFilter;
 
-CommentFilter.prototype =
-{
-  __proto__: Filter.prototype,
-
+CommentFilter.prototype = extend(Filter, {
   type: "comment",
 
   /**
    * See Filter.serialize()
    */
   serialize: function(buffer) {}
-};
+});
 
 /**
  * Abstract base class for filters that can get hits
@@ -267,10 +262,7 @@ function ActiveFilter(text, domains)
 }
 exports.ActiveFilter = ActiveFilter;
 
-ActiveFilter.prototype =
-{
-  __proto__: Filter.prototype,
-
+ActiveFilter.prototype = extend(Filter, {
   _disabled: false,
   _hitCount: 0,
   _lastHit: 0,
@@ -515,7 +507,7 @@ ActiveFilter.prototype =
         buffer.push("lastHit=" + this._lastHit);
     }
   }
-};
+});
 
 /**
  * Abstract base class for RegExp-based filters
@@ -556,10 +548,7 @@ function RegExpFilter(text, regexpSource, contentType, matchCase, domains, third
 }
 exports.RegExpFilter = RegExpFilter;
 
-RegExpFilter.prototype =
-{
-  __proto__: ActiveFilter.prototype,
-
+RegExpFilter.prototype = extend(ActiveFilter, {
   /**
    * @see ActiveFilter.domainSourceIsUpperCase
    */
@@ -664,7 +653,7 @@ RegExpFilter.prototype =
 
     return false;
   }
-};
+});
 
 // Required to optimize Matcher, see also RegExpFilter.prototype.length
 Object.defineProperty(RegExpFilter.prototype, "0",
@@ -810,10 +799,7 @@ function BlockingFilter(text, regexpSource, contentType, matchCase, domains, thi
 }
 exports.BlockingFilter = BlockingFilter;
 
-BlockingFilter.prototype =
-{
-  __proto__: RegExpFilter.prototype,
-
+BlockingFilter.prototype = extend(RegExpFilter, {
   type: "blocking",
 
   /**
@@ -821,7 +807,7 @@ BlockingFilter.prototype =
    * @type Boolean
    */
   collapse: null
-};
+});
 
 /**
  * Class for whitelist filters
@@ -841,12 +827,9 @@ function WhitelistFilter(text, regexpSource, contentType, matchCase, domains, th
 }
 exports.WhitelistFilter = WhitelistFilter;
 
-WhitelistFilter.prototype =
-{
-  __proto__: RegExpFilter.prototype,
-
+WhitelistFilter.prototype = extend(RegExpFilter, {
   type: "whitelist"
-};
+});
 
 /**
  * Base class for element hiding filters
@@ -866,10 +849,7 @@ function ElemHideBase(text, domains, selector)
 }
 exports.ElemHideBase = ElemHideBase;
 
-ElemHideBase.prototype =
-{
-  __proto__: ActiveFilter.prototype,
-
+ElemHideBase.prototype = extend(ActiveFilter, {
   /**
    * @see ActiveFilter.domainSeparator
    */
@@ -890,7 +870,7 @@ ElemHideBase.prototype =
    * @type String
    */
   selector: null
-};
+});
 
 /**
  * Creates an element hiding filter from a pre-parsed text representation
@@ -975,12 +955,9 @@ function ElemHideFilter(text, domains, selector)
 }
 exports.ElemHideFilter = ElemHideFilter;
 
-ElemHideFilter.prototype =
-{
-  __proto__: ElemHideBase.prototype,
-
+ElemHideFilter.prototype = extend(ElemHideBase, {
   type: "elemhide"
-};
+});
 
 /**
  * Class for element hiding exceptions
@@ -996,12 +973,9 @@ function ElemHideException(text, domains, selector)
 }
 exports.ElemHideException = ElemHideException;
 
-ElemHideException.prototype =
-{
-  __proto__: ElemHideBase.prototype,
-
+ElemHideException.prototype = extend(ElemHideBase, {
   type: "elemhideexception"
-};
+});
 
 /**
  * Class for CSS property filters
@@ -1025,10 +999,7 @@ function CSSPropertyFilter(text, domains, selector, regexpSource,
 }
 exports.CSSPropertyFilter = CSSPropertyFilter;
 
-CSSPropertyFilter.prototype =
-{
-  __proto__: ElemHideBase.prototype,
-
+CSSPropertyFilter.prototype = extend(ElemHideBase, {
   type: "cssproperty",
 
   /**
@@ -1067,4 +1038,4 @@ CSSPropertyFilter.prototype =
     Object.defineProperty(this, "regexpString", {value: regexp});
     return regexp;
   }
-};
+});