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

compiled/CSSPropertyFilter.h

+#ifndef ADBLOCK_PLUS_CSS_PROPERTY_FILTER_H
+#define ADBLOCK_PLUS_CSS_PROPERTY_FILTER_H
+
+#include <cstddef>
+#include <string>
+
+#include "Filter.h"
+#include "ElemHideBase.h"
+
+class CSSPropertyFilter: public ElemHideBase
+{
+private:
+  std::u16string regexp;
+  std::u16string prefix;
+  std::u16string suffix;
+public:
+  CSSPropertyFilter(const std::u16string& text, const std::u16string& domains,
+      const std::u16string& selector, const std::u16string& regexpSource,
+      const std::u16string& prefix, const std::u16string& suffix);
+  Type GetType() const;
+  const std::u16string GetRegExpString()
+  {
+    return regexp;
+  }
+  const std::u16string GetSelectorPrefix()
+  {
+    return prefix;
+  }
+  const std::u16string GetSelectorSuffix()
+  {
+    return suffix;
+  }
+};
+
+#endif