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

chrome/browser/ui/webui/options/content_settings_handler.cc

Index: chrome/browser/ui/webui/options/content_settings_handler.cc
diff --git a/chrome/browser/ui/webui/options/content_settings_handler.cc b/chrome/browser/ui/webui/options/content_settings_handler.cc
index b72dfe7301f7415ada5ba89467cd48e087cdbfd1..757ec244d3c5e7d3ae691d216fd6a4e6f4ee0761 100644
--- a/chrome/browser/ui/webui/options/content_settings_handler.cc
+++ b/chrome/browser/ui/webui/options/content_settings_handler.cc
@@ -941,8 +941,8 @@
   settings.exceptions.clear();
   for (base::ListValue::const_iterator entry = exceptions.begin();
        entry != exceptions.end(); ++entry) {
-    const base::DictionaryValue* dict = nullptr;
-    bool valid_dict = entry->GetAsDictionary(&dict);
+    base::DictionaryValue* dict = nullptr;
+    bool valid_dict = (*entry)->GetAsDictionary(&dict);
     DCHECK(valid_dict);
 
     std::string origin;