Making ES6PrototypeChain flag default to true

Author: MSLaguana

lib/Common/ConfigFlagsList.h

@@ -628,12 +628,16 @@ PHASE(All)
 #define DEFAULT_CONFIG_ES6String               (true)
 #define DEFAULT_CONFIG_ES6StringPrototypeFixes (true)
 #define DEFAULT_CONFIG_ES2018ObjectRestSpread  (false)
+
+#ifndef DEFAULT_CONFIG_ES6PrototypeChain
 #ifdef COMPILE_DISABLE_ES6PrototypeChain
     // If ES6PrototypeChain needs to be disabled by compile flag, DEFAULT_CONFIG_ES6PrototypeChain should be false
     #define DEFAULT_CONFIG_ES6PrototypeChain       (false)
 #else
-    #define DEFAULT_CONFIG_ES6PrototypeChain       (false)
+    #define DEFAULT_CONFIG_ES6PrototypeChain       (true)
+#endif
 #endif
+
 #define DEFAULT_CONFIG_ES6ToPrimitive          (true)
 #define DEFAULT_CONFIG_ES6ToLength             (true)
 #define DEFAULT_CONFIG_ES6ToStringTag          (true)
@@ -1126,10 +1130,7 @@ FLAGPR           (Boolean, ES6, ES6String              , "Enable ES6 String exte
 FLAGPR           (Boolean, ES6, ES6StringPrototypeFixes, "Enable ES6 String.prototype fixes"                        , DEFAULT_CONFIG_ES6StringPrototypeFixes)
 FLAGPR           (Boolean, ES6, ES2018ObjectRestSpread , "Enable ES2018 Object Rest/Spread"                         , DEFAULT_CONFIG_ES2018ObjectRestSpread)
 
-#ifndef COMPILE_DISABLE_ES6PrototypeChain
-    #define COMPILE_DISABLE_ES6PrototypeChain 0
-#endif
-FLAGPR_REGOVR_EXP(Boolean, ES6, ES6PrototypeChain      , "Enable ES6 prototypes (Example: Date prototype is object)", DEFAULT_CONFIG_ES6PrototypeChain)
+FLAGPR           (Boolean, ES6, ES6PrototypeChain      , "Enable ES6 prototypes (Example: Date prototype is object)", DEFAULT_CONFIG_ES6PrototypeChain)
 FLAGPR           (Boolean, ES6, ES6ToPrimitive         , "Enable ES6 ToPrimitive symbol"                            , DEFAULT_CONFIG_ES6ToPrimitive)
 FLAGPR           (Boolean, ES6, ES6ToLength            , "Enable ES6 ToLength fixes"                                , DEFAULT_CONFIG_ES6ToLength)
 FLAGPR           (Boolean, ES6, ES6ToStringTag         , "Enable ES6 ToStringTag symbol"                            , DEFAULT_CONFIG_ES6ToStringTag)