--- a/layout/style/nsCSSProps.cpp
+++ b/layout/style/nsCSSProps.cpp
@@ -2172,45 +2172,16 @@ nsCSSProps::ValueToKeyword(int32_t aValu
   if (keyword == eCSSKeyword_UNKNOWN) {
     static nsDependentCString sNullStr("");
     return sNullStr;
   } else {
     return nsCSSKeywords::GetStringValue(keyword);
   }
 }
 
-/* static */ const KTableEntry* const
-nsCSSProps::kKeywordTableTable[eCSSProperty_COUNT_no_shorthands] = {
-  #define CSS_PROP(name_, id_, method_, pref_, parsevariant_, \
-                   kwtable_) kwtable_,
-  #include "nsCSSPropList.h"
-  #undef CSS_PROP
-};
-
-const nsCString&
-nsCSSProps::LookupPropertyValue(nsCSSPropertyID aProp, int32_t aValue)
-{
-  MOZ_ASSERT(aProp >= 0 && aProp < eCSSProperty_COUNT,
-             "property out of range");
-#ifdef DEBUG
-  typedef decltype(KTableEntry::mValue) table_value_type;
-  NS_ASSERTION(table_value_type(aValue) == aValue, "Value out of range");
-#endif
-
-  const KTableEntry* kwtable = nullptr;
-  if (aProp < eCSSProperty_COUNT_no_shorthands)
-    kwtable = kKeywordTableTable[aProp];
-
-  if (kwtable)
-    return ValueToKeyword(aValue, kwtable);
-
-  static nsDependentCString sNullStr("");
-  return sNullStr;
-}
-
 bool nsCSSProps::GetColorName(int32_t aPropValue, nsCString &aStr)
 {
   bool rv = false;
 
   // first get the keyword corresponding to the property Value from the color table
   nsCSSKeyword keyword = ValueToKeywordEnum(aPropValue, kColorKTable);
 
   // next get the name as a string from the keywords table

--- a/layout/style/nsCSSProps.h
+++ b/layout/style/nsCSSProps.h
@@ -95,21 +95,16 @@ public:
   // Same but for @font-face descriptors
   static nsCSSFontDesc LookupFontDesc(const nsAString& aProperty);
 
   // Given a property enum, get the string value
   static const nsCString& GetStringValue(nsCSSPropertyID aProperty);
   static const nsCString& GetStringValue(nsCSSFontDesc aFontDesc);
   static const nsCString& GetStringValue(nsCSSCounterDesc aCounterDesc);
 
-  // Given a CSS Property and a Property Enum Value
-  // Return back a const nsString& representation of the
-  // value. Return back nullstr if no value is found
-  static const nsCString& LookupPropertyValue(nsCSSPropertyID aProperty, int32_t aValue);
-
   // Get a color name for a predefined color value like buttonhighlight or activeborder
   // Sets the aStr param to the name of the propertyID
   static bool GetColorName(int32_t aPropID, nsCString &aStr);
 
   // Returns the index of |aKeyword| in |aTable|, if it exists there;
   // otherwise, returns -1.
   // NOTE: Generally, clients should call FindKeyword() instead of this method.
   static int32_t FindIndexOfKeyword(nsCSSKeyword aKeyword,
@@ -139,18 +134,16 @@ public:
            typename = typename std::enable_if<std::is_enum<T>::value>::type>
   static const nsCString& ValueToKeyword(T aValue, const KTableEntry aTable[])
   {
     static_assert(mozilla::EnumTypeFitsWithin<T, int16_t>::value,
                   "aValue must be an enum that fits within KTableEntry::mValue");
     return ValueToKeyword(static_cast<int16_t>(aValue), aTable);
   }
 
-  static const KTableEntry* const kKeywordTableTable[eCSSProperty_COUNT_no_shorthands];
-
 private:
   static const Flags kFlagsTable[eCSSProperty_COUNT];
 
 public:
   static inline bool PropHasFlags(nsCSSPropertyID aProperty, Flags aFlags)
   {
     MOZ_ASSERT(0 <= aProperty && aProperty < eCSSProperty_COUNT,
                "out of range");