Use std::unique_ptr for base::DictionaryValue and base::ListValue's internal store.

chrome/browser/ui/webui/site_settings_helper.cc

Index: chrome/browser/ui/webui/site_settings_helper.cc
diff --git a/chrome/browser/ui/webui/site_settings_helper.cc b/chrome/browser/ui/webui/site_settings_helper.cc
index 6684d2d66b9fac75e46d681986788bbef1193ffd..a967b9ea58583678b3c12392fb4f8a95ee19d554 100644
--- a/chrome/browser/ui/webui/site_settings_helper.cc
+++ b/chrome/browser/ui/webui/site_settings_helper.cc
@@ -149,7 +149,7 @@ void GetPolicyAllowedUrls(
 
   // Convert the URLs to |ContentSettingsPattern|s. Ignore any invalid ones.
   std::vector<ContentSettingsPattern> patterns;
-  for (const base::Value* entry : *policy_urls) {
+  for (const auto& entry : *policy_urls) {
     std::string url;
     bool valid_string = entry->GetAsString(&url);
     if (!valid_string)