Stop passing raw pointers to base::Value API in c/b/chromeos and c/b/extensions

chrome/browser/extensions/extension_web_ui.cc

Index: chrome/browser/extensions/extension_web_ui.cc
diff --git a/chrome/browser/extensions/extension_web_ui.cc b/chrome/browser/extensions/extension_web_ui.cc
index 80776b8d01b45c3edd17fcc36a3dd7822a3e8953..99c6baf2513b579411fbed98df1527d79125b853 100644
--- a/chrome/browser/extensions/extension_web_ui.cc
+++ b/chrome/browser/extensions/extension_web_ui.cc
@@ -470,12 +470,14 @@ void ExtensionWebUI::RegisterOrActivateChromeURLOverrides(
   DictionaryPrefUpdate update(prefs, kExtensionURLOverrides);
   base::DictionaryValue* all_overrides = update.Get();
   for (const auto& page_override_pair : overrides) {
-    base::ListValue* page_overrides = nullptr;
-    if (!all_overrides->GetList(page_override_pair.first, &page_overrides)) {
-      page_overrides = new base::ListValue();
-      all_overrides->Set(page_override_pair.first, page_overrides);
+    base::ListValue* page_overrides_weak = nullptr;
+    if (!all_overrides->GetList(page_override_pair.first,
+                                &page_overrides_weak)) {
+      auto page_overrides = base::MakeUnique<base::ListValue>();
+      page_overrides_weak = page_overrides.get();
+      all_overrides->Set(page_override_pair.first, std::move(page_overrides));
     }
-    AddOverridesToList(page_overrides, page_override_pair.second.spec());
+    AddOverridesToList(page_overrides_weak, page_override_pair.second.spec());
   }
 }