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

chrome/browser/extensions/extension_messages_apitest.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 <stddef.h>
 #include <stdint.h>
+
+#include <memory>
 #include <utility>
 
 #include "base/base64.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/macros.h"
 #include "base/path_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
@@ skipping 41 matching lines @@
   MessageSender() {
     registrar_.Add(this,
                    extensions::NOTIFICATION_EXTENSION_HOST_DID_STOP_FIRST_LOAD,
                    content::NotificationService::AllSources());
   }
 
  private:
   static std::unique_ptr<base::ListValue> BuildEventArguments(
       const bool last_message,
       const std::string& data) {
-    base::DictionaryValue* event = new base::DictionaryValue();
+    std::unique_ptr<base::DictionaryValue> event(new base::DictionaryValue());
     event->SetBoolean("lastMessage", last_message);
     event->SetString("data", data);
     std::unique_ptr<base::ListValue> arguments(new base::ListValue());
-    arguments->Append(event);
+    arguments->Append(std::move(event));
     return arguments;
   }
 
   static std::unique_ptr<Event> BuildEvent(
       std::unique_ptr<base::ListValue> event_args,
       Profile* profile,
       GURL event_url) {
     std::unique_ptr<Event> event(new Event(
         events::TEST_ON_MESSAGE, "test.onMessage", std::move(event_args)));
     event->restrict_to_browser_context = profile;
@@ skipping 1168 matching lines @@
   ui_test_utils::NavigateToURL(browser(), chromium_org_url());
   EXPECT_EQ(COULD_NOT_ESTABLISH_CONNECTION_ERROR,
             CanConnectAndSendMessagesToMainFrame(invalid.get()));
 }
 
 #endif  // !defined(OS_WIN) - http://crbug.com/350517.
 
 }  // namespace
 
 };  // namespace extensions