Rewrite simple uses of base::ListValue::Append() taking a raw pointer var.

components/signin/core/browser/about_signin_internals.cc

 // Copyright (c) 2012 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 "components/signin/core/browser/about_signin_internals.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 646 matching lines @@
       token_details->Append(token_info);
     }
   }
 
   base::ListValue* account_info = new base::ListValue();
   signin_status->Set("accountInfo", account_info);
   const std::vector<std::string>& accounts_in_token_service =
       token_service->GetAccounts();
 
   if(accounts_in_token_service.size() == 0) {
-    base::DictionaryValue* no_token_entry = new base::DictionaryValue();
+    std::unique_ptr<base::DictionaryValue> no_token_entry(
+        new base::DictionaryValue());
     no_token_entry->SetString("accountId", "No token in Token Service.");
-    account_info->Append(no_token_entry);
+    account_info->Append(std::move(no_token_entry));
   }
 
   for(const std::string& account_id : accounts_in_token_service) {
-    base::DictionaryValue* entry = new base::DictionaryValue();
+    std::unique_ptr<base::DictionaryValue> entry(new base::DictionaryValue());
     entry->SetString("accountId", account_id);
-    account_info->Append(entry);
+    account_info->Append(std::move(entry));
   }
 
   return signin_status;
 }