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

chrome/browser/ui/webui/print_preview/print_preview_handler.cc

Index: chrome/browser/ui/webui/print_preview/print_preview_handler.cc
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
index 66009cba46129547c7b38beca918586eb25c8814..a30e43b2eea7f184bf051abcca1f72ce5ee2cba9 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
+++ b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
@@ -168,7 +168,7 @@ int GetPageCountFromSettingsDictionary(const DictionaryValue& settings) {
   const ListValue* page_range_array;
   if (settings.GetList(printing::kSettingPageRange, &page_range_array)) {
     for (size_t index = 0; index < page_range_array->GetSize(); ++index) {
-      DictionaryValue* dict;
+      const DictionaryValue* dict;
       if (!page_range_array->GetDictionary(index, &dict))
         continue;