Correct const accessors in base/values.(h|cc), Part II (ListValue)

base/json/json_value_converter.h

 // Copyright (c) 2012 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 BASE_JSON_JSON_VALUE_CONVERTER_H_
 #define BASE_JSON_JSON_VALUE_CONVERTER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 255 matching lines @@
   virtual bool Convert(
       const base::Value& value, ScopedVector<Element>* field) const OVERRIDE {
     const base::ListValue* list = NULL;
     if (!value.GetAsList(&list)) {
       // The field is not a list.
       return false;
     }
 
     field->reserve(list->GetSize());
     for (size_t i = 0; i < list->GetSize(); ++i) {
-      base::Value* element = NULL;
+      const base::Value* element = NULL;
       if (!list->Get(i, &element))
         continue;
 
       scoped_ptr<Element> e(new Element);
       if (basic_converter_.Convert(*element, e.get())) {
         field->push_back(e.release());
       } else {
         DVLOG(1) << "failure at " << i << "-th element";
         return false;
       }
@@ skipping 13 matching lines @@
   RepeatedMessageConverter() {}
 
   virtual bool Convert(const base::Value& value,
                        ScopedVector<NestedType>* field) const OVERRIDE {
     const base::ListValue* list = NULL;
     if (!value.GetAsList(&list))
       return false;
 
     field->reserve(list->GetSize());
     for (size_t i = 0; i < list->GetSize(); ++i) {
-      base::Value* element = NULL;
+      const base::Value* element = NULL;
       if (!list->Get(i, &element))
         continue;
 
       scoped_ptr<NestedType> nested(new NestedType);
       if (converter_.Convert(*element, nested.get())) {
         field->push_back(nested.release());
       } else {
         DVLOG(1) << "failure at " << i << "-th element";
         return false;
       }
@@ skipping 16 matching lines @@
       : convert_func_(convert_func) {}
 
   virtual bool Convert(const base::Value& value,
                        ScopedVector<NestedType>* field) const OVERRIDE {
     const base::ListValue* list = NULL;
     if (!value.GetAsList(&list))
       return false;
 
     field->reserve(list->GetSize());
     for (size_t i = 0; i < list->GetSize(); ++i) {
-      base::Value* element = NULL;
+      const base::Value* element = NULL;
       if (!list->Get(i, &element))
         continue;
 
       scoped_ptr<NestedType> nested(new NestedType);
       if ((*convert_func_)(element, nested.get())) {
         field->push_back(nested.release());
       } else {
         DVLOG(1) << "failure at " << i << "-th element";
         return false;
       }
@@ skipping 160 matching lines @@
 
  private:
   ScopedVector<internal::FieldConverterBase<StructType> > fields_;
 
   DISALLOW_COPY_AND_ASSIGN(JSONValueConverter);
 };
 
 }  // namespace base
 
 #endif  // BASE_JSON_JSON_VALUE_CONVERTER_H_