Rewrite simple uses of base::ListValue::Append(base::Value*) on CrOS.

chrome/browser/chromeos/extensions/input_method_event_router.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 "chrome/browser/chromeos/extensions/input_method_event_router.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/json/json_writer.h"
@@ skipping 25 matching lines @@
     bool show_message) {
   // This should probably be CHECK, as delivering event to a wrong
   // profile means delivering it to a wrong extension instance.
   DCHECK(profile->IsSameProfile(Profile::FromBrowserContext(context_)));
   extensions::EventRouter* router = extensions::EventRouter::Get(context_);
 
   if (!router->HasEventListener(OnChanged::kEventName))
     return;
 
   std::unique_ptr<base::ListValue> args(new base::ListValue());
-  args->Append(new base::StringValue(
-      manager->GetActiveIMEState()->GetCurrentInputMethod().id()));
+  args->AppendString(
+      manager->GetActiveIMEState()->GetCurrentInputMethod().id());
 
   // The router will only send the event to extensions that are listening.
   std::unique_ptr<extensions::Event> event(
       new extensions::Event(extensions::events::INPUT_METHOD_PRIVATE_ON_CHANGED,
                             OnChanged::kEventName, std::move(args)));
   event->restrict_to_browser_context = context_;
   router->BroadcastEvent(std::move(event));
 }
 
 }  // namespace chromeos