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

chrome/browser/chromeos/login/ui/webui_login_view.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/chromeos/login/ui/webui_login_view.h"
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 460 matching lines @@
 
   const base::Value* const raw_list_value =
       settings->GetPref(kLoginVideoCaptureAllowedUrls);
   if (!raw_list_value) {
     controller.PermissionDenied();
     return;
   }
 
   const base::ListValue* list_value;
   CHECK(raw_list_value->GetAsList(&list_value));
-  for (base::Value* base_value : *list_value) {
+  for (const auto& base_value : *list_value) {
     std::string value;
     if (base_value->GetAsString(&value)) {
       ContentSettingsPattern pattern =
           ContentSettingsPattern::FromString(value);
       if (pattern == ContentSettingsPattern::Wildcard()) {
         LOG(WARNING) << "Ignoring wildcard URL pattern: " << value;
         continue;
       }
       if (pattern.IsValid() && pattern.Matches(request.security_origin)) {
         controller.PermissionGranted();
@@ skipping 57 matching lines @@
   if (should_emit_login_prompt_visible_) {
     VLOG(1) << "Login WebUI >> login-prompt-visible";
     chromeos::DBusThreadManager::Get()->GetSessionManagerClient()->
         EmitLoginPromptVisible();
   }
 
   webui_visible_ = true;
 }
 
 }  // namespace chromeos