Issue 4125 - [emscripten] Convert filter classes to C++

compiled/bindings.cpp

 #include "bindings.ipp"
 #include "Filter.h"
 #include "InvalidFilter.h"
 #include "CommentFilter.h"
 #include "ActiveFilter.h"
 #include "RegExpFilter.h"
 #include "BlockingFilter.h"
 #include "WhitelistFilter.h"
 #include "ElemHideBase.h"
 #include "ElemHideFilter.h"
 #include "ElemHideException.h"
 #include "CSSPropertyFilter.h"
 
 EMSCRIPTEN_BINDINGS
 {
   class_<Filter>("Filter")
       .property("text", &Filter::GetText)
       .function("serialize", &Filter::Serialize)
       .class_function("fromText", &Filter::FromText)
-      .class_function("getKnownFilter", &Filter::GetKnownFilter)
-      .subclass_differentiator(&Filter::GetType, {
+      .subclass_differentiator(&Filter::mType, {
         {Filter::Type::INVALID, "InvalidFilter"},
         {Filter::Type::COMMENT, "CommentFilter"},
         {Filter::Type::BLOCKING, "BlockingFilter"},
         {Filter::Type::WHITELIST, "WhitelistFilter"},
         {Filter::Type::ELEMHIDE, "ElemHideFilter"},
         {Filter::Type::ELEMHIDEEXCEPTION, "ElemHideException"},
         {Filter::Type::CSSPROPERTY, "CSSPropertyFilter"},
       });
 
   class_<InvalidFilter,Filter>("InvalidFilter")
@@ skipping 31 matching lines @@
 
   class_<ElemHideException,ElemHideBase>("ElemHideException")
       .class_property("type", "'elemhideexception'");
 
   class_<CSSPropertyFilter,ElemHideBase>("CSSPropertyFilter")
       .class_property("type", "'cssproperty'")
       .property("regexpString", &CSSPropertyFilter::GetRegExpString)
       .property("selectorPrefix", &CSSPropertyFilter::GetSelectorPrefix)
       .property("selectorSuffix", &CSSPropertyFilter::GetSelectorSuffix);
 }