Revert of Change base::Value::ListStorage to std::vector<base::Value>

headless/public/internal/value_conversions.h

 // Copyright 2016 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.
 
 #ifndef HEADLESS_PUBLIC_INTERNAL_VALUE_CONVERSIONS_H_
 #define HEADLESS_PUBLIC_INTERNAL_VALUE_CONVERSIONS_H_
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
@@ skipping 133 matching lines @@
 struct FromValue<std::vector<T>> {
   static std::vector<T> Parse(const base::Value& value, ErrorReporter* errors) {
     std::vector<T> result;
     const base::ListValue* list;
     if (!value.GetAsList(&list)) {
       errors->AddError("list value expected");
       return result;
     }
     errors->Push();
     for (const auto& item : *list)
-      result.push_back(FromValue<T>::Parse(item, errors));
+      result.push_back(FromValue<T>::Parse(*item, errors));
     errors->Pop();
     return result;
   }
 };
 
 }  // namespace internal
 }  // namespace headless
 
 #endif  // HEADLESS_PUBLIC_INTERNAL_VALUE_CONVERSIONS_H_