switch to using native JSON object

chrome/renderer/js_only_v8_extensions.cc

 // Copyright (c) 2009 The Chromium 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 "chrome/renderer/js_only_v8_extensions.h"
 
 #include "chrome/renderer/extensions/bindings_utils.h"
 #include "grit/renderer_resources.h"
 #include "grit/webkit_resources.h"
 
 // BaseJsV8Extension
 const char* BaseJsV8Extension::kName = "chrome/base";
 v8::Extension* BaseJsV8Extension::Get() {
   return new v8::Extension(kName, GetStringResource<IDR_DEVTOOLS_BASE_JS>(),
                            0, NULL);
 }
 
-// JsonJsV8Extension
-const char* JsonJsV8Extension::kName = "chrome/json";
-v8::Extension* JsonJsV8Extension::Get() {
-  static const char* deps[] = {
-    BaseJsV8Extension::kName
-  };
-  return new v8::Extension(kName, GetStringResource<IDR_DEVTOOLS_JSON_JS>(),
-                           arraysize(deps), deps);
-}
-
 // JsonSchemaJsV8Extension
 const char* JsonSchemaJsV8Extension::kName = "chrome/jsonschema";
 v8::Extension* JsonSchemaJsV8Extension::Get() {
   return new v8::Extension(kName, GetStringResource<IDR_JSON_SCHEMA_JS>(),
                            0, NULL);
 }