[json] replace remaining json.js code with C++ builtins.

src/bootstrapper.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/code-stubs.h"
 #include "src/extensions/externalize-string-extension.h"
@@ skipping 1457 matching lines @@
     SimpleInstallFunction(prototype, "getUTCSeconds",
                           Builtins::kDatePrototypeGetUTCSeconds, 0, true);
     SimpleInstallFunction(prototype, "setUTCSeconds",
                           Builtins::kDatePrototypeSetUTCSeconds, 2, false);
     SimpleInstallFunction(prototype, "valueOf", Builtins::kDatePrototypeValueOf,
                           0, false);
     SimpleInstallFunction(prototype, "getYear", Builtins::kDatePrototypeGetYear,
                           0, true);
     SimpleInstallFunction(prototype, "setYear", Builtins::kDatePrototypeSetYear,
                           1, false);
+    SimpleInstallFunction(prototype, "toJSON", Builtins::kDatePrototypeToJson,
+                          1, false);
 
     // Install i18n fallback functions.
     SimpleInstallFunction(prototype, "toLocaleString",
                           Builtins::kDatePrototypeToString, 0, false);
     SimpleInstallFunction(prototype, "toLocaleDateString",
                           Builtins::kDatePrototypeToDateString, 0, false);
     SimpleInstallFunction(prototype, "toLocaleTimeString",
                           Builtins::kDatePrototypeToTimeString, 0, false);
 
     // Install the @@toPrimitive function.
@@ skipping 106 matching lines @@
   if (context_type == THIN_CONTEXT) return;
 
   {  // -- J S O N
     Handle<String> name = factory->InternalizeUtf8String("JSON");
     Handle<JSFunction> cons = factory->NewFunction(name);
     JSFunction::SetInstancePrototype(cons,
         Handle<Object>(native_context()->initial_object_prototype(), isolate));
     Handle<JSObject> json_object = factory->NewJSObject(cons, TENURED);
     DCHECK(json_object->IsJSObject());
     JSObject::AddProperty(global, name, json_object, DONT_ENUM);
+    SimpleInstallFunction(json_object, "parse", Builtins::kJsonParse, 2, true);
     SimpleInstallFunction(json_object, "stringify", Builtins::kJsonStringify, 3,
                           true);
+    JSObject::AddProperty(
+        json_object, factory->to_string_tag_symbol(),
+        factory->NewStringFromAsciiChecked("JSON"),
+        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));
   }
 
   {  // -- M a t h
     Handle<String> name = factory->InternalizeUtf8String("Math");
     Handle<JSFunction> cons = factory->NewFunction(name);
     JSFunction::SetInstancePrototype(
         cons,
         Handle<Object>(native_context()->initial_object_prototype(), isolate));
     Handle<JSObject> math = factory->NewJSObject(cons, TENURED);
     DCHECK(math->IsJSObject());
@@ skipping 2179 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8