[MERGE #5407 @MSLaguana] Enable es6 prototype chain by default

We want to enable the `-Es6PrototypeChain` flag by default to support the spec better. Most of this PR is updating test baselines.

Fixes #5065

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)

test/Date/DateGetSet.baseline

@@ -84,9 +84,3 @@ toUTCString : Fri, 26 Jul 35816 03:06:07 GMT
 valueOf : 1068094436767008
 toISOString method : function
 toJSON method : function
-1905
-1904
-0
-1999
-1998
-5

test/Date/DateGetSet.js

@@ -183,14 +183,11 @@ WScript.Echo("valueOf : " + d.valueOf())
 WScript.Echo("toISOString method : " + typeof d.toISOString);
 WScript.Echo("toJSON method : " + typeof d.toJSON);
 
-// Set fullYear/fullYear+month/year on the Date prototype
-Date.prototype.setYear(5);                  // Year
-WScript.Echo(Date.prototype.getFullYear());
-Date.prototype.setYear(4, 4);               // Year, month -- month should be ignored
-WScript.Echo(Date.prototype.getFullYear());
-WScript.Echo(Date.prototype.getMonth());
-Date.prototype.setFullYear(1999);           // Only full year
-WScript.Echo(Date.prototype.getFullYear());
-Date.prototype.setFullYear(1998, 5);        // Full year and month
-WScript.Echo(Date.prototype.getFullYear());
-WScript.Echo(Date.prototype.getMonth());
+WScript.LoadScriptFile("..\\UnitTestFramework\\UnitTestFramework.js", "self");
+
+assert.throws(() => Date.prototype.setYear(5), TypeError);
+assert.throws(() => Date.prototype.getFullYear(), TypeError);
+assert.throws(() => Date.prototype.setYear(4, 4), TypeError);
+assert.throws(() => Date.prototype.getMonth(), TypeError);
+assert.throws(() => Date.prototype.setFullYear(1999), TypeError);
+assert.throws(() => Date.prototype.setFullYear(1998, 5), TypeError);

test/Debugger/JsrtDebugUtilsAddPropertyType.js.dbg.baseline

@@ -34,10 +34,10 @@
         "a14": {
           "#__proto__": "function <large string>",
           "prototype": "Object {...}",
+          "length": "number 0",
           "name": "string func",
           "caller": "object null",
-          "arguments": "object null",
-          "length": "number 0"
+          "arguments": "object null"
         },
         "a15": {
           "#__proto__": "Array []",
@@ -61,7 +61,7 @@
           "#__proto__": "Object {...}"
         },
         "a19": {
-          "#__proto__": "RegExp ",
+          "#__proto__": "Object {...}",
           "lastIndex": "number 0",
           "global": "boolean false",
           "multiline": "boolean false",
@@ -73,13 +73,13 @@
           "sticky": "boolean false"
         },
         "a20": {
-          "#__proto__": "Error ",
+          "#__proto__": "Object {...}",
           "description": "string Hello World!",
           "message": "string Hello World!",
           "stack": "string <large string>"
         },
         "a21": {
-          "#__proto__": "Error ",
+          "#__proto__": "Object {...}",
           "message": "string Hello World!",
           "stack": "string <large string>"
         },

test/DebuggerCommon/ES6_RegExp_specialproperties_all.js.dbg.baseline

@@ -2,7 +2,7 @@
   {
     "evaluate": {
       "r": {
-        "#__proto__": "RegExp ",
+        "#__proto__": "Object {...}",
         "lastIndex": "number 0",
         "global": "boolean false",
         "multiline": "boolean false",

test/DebuggerCommon/ES6_RegExp_specialproperties_default.js.dbg.baseline

@@ -2,7 +2,7 @@
   {
     "evaluate": {
       "r": {
-        "#__proto__": "RegExp ",
+        "#__proto__": "Object {...}",
         "lastIndex": "number 0",
         "global": "boolean false",
         "multiline": "boolean false",

test/DebuggerCommon/ES6_RegExp_specialproperties_with_sticky.js.dbg.baseline

@@ -2,7 +2,7 @@
   {
     "evaluate": {
       "r": {
-        "#__proto__": "RegExp ",
+        "#__proto__": "Object {...}",
         "lastIndex": "number 0",
         "global": "boolean false",
         "multiline": "boolean false",

test/DebuggerCommon/ES6_RegExp_specialproperties_with_unicode.js.dbg.baseline

@@ -2,7 +2,7 @@
   {
     "evaluate": {
       "r": {
-        "#__proto__": "RegExp ",
+        "#__proto__": "Object {...}",
         "lastIndex": "number 0",
         "global": "boolean false",
         "multiline": "boolean false",

test/DebuggerCommon/ES6_letconst_trycatch_simple_fast.js.dbg.baseline

@@ -40,7 +40,7 @@
     },
     "locals": {
       "e": {
-        "#__proto__": "Error ",
+        "#__proto__": "Object {...}",
         "number": "number 0",
         "description": "string ",
         "stack": "string <large string>"

test/DebuggerCommon/attachWithDeferParse.js.dbg.baseline

@@ -41,18 +41,18 @@
       "f1": {
         "#__proto__": "function <large string>",
         "prototype": "Object {...}",
+        "length": "number 0",
         "name": "string f1",
         "caller": "object null",
-        "arguments": "object null",
-        "length": "number 0"
+        "arguments": "object null"
       },
       "g": {
         "#__proto__": "function <large string>",
         "prototype": "Object {...}",
+        "length": "number 0",
         "name": "string g",
         "caller": "object null",
-        "arguments": "object null",
-        "length": "number 0"
+        "arguments": "object null"
       }
     },
     "globals": {
@@ -75,7 +75,7 @@
     },
     "locals": {
       "t": {
-        "#__proto__": "Error ",
+        "#__proto__": "Object {...}",
         "message": "string <large string>",
         "description": "string <large string>",
         "number": "number -2146823279",
@@ -85,26 +85,26 @@
       "s": {
         "#__proto__": "function <large string>",
         "prototype": "Object {...}",
+        "length": "number 2",
         "name": "string ",
         "caller": "object null",
-        "arguments": "object null",
-        "length": "number 2"
+        "arguments": "object null"
       },
       "f1": {
         "#__proto__": "function <large string>",
         "prototype": "Object {...}",
+        "length": "number 0",
         "name": "string f1",
         "caller": "object null",
-        "arguments": "object null",
-        "length": "number 0"
+        "arguments": "object null"
       },
       "g": {
         "#__proto__": "function <large string>",
         "prototype": "Object {...}",
+        "length": "number 0",
         "name": "string g",
         "caller": "object null",
-        "arguments": "object null",
-        "length": "number 0"
+        "arguments": "object null"
       }
     },
     "globals": {