Make Use of Value::GetList API

chrome/browser/ui/webui/settings/protocol_handlers_handler.cc

 // Copyright 2016 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/ui/webui/settings/protocol_handlers_handler.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 183 matching lines @@
 
 void ProtocolHandlersHandler::HandleClearDefault(const base::ListValue* args) {
   const base::Value* value;
   CHECK(args->Get(0, &value));
   std::string protocol_to_clear;
   CHECK(value->GetAsString(&protocol_to_clear));
   GetProtocolHandlerRegistry()->ClearDefault(protocol_to_clear);
 }
 
 void ProtocolHandlersHandler::HandleSetDefault(const base::ListValue* args) {
-  const base::ListValue* list;
-  CHECK(args->GetList(0, &list));
+  const base::ListValue* list =
+      static_cast<const base::ListValue*>(&args->base::Value::GetList()[0]);
   const ProtocolHandler& handler(ParseHandlerFromArgs(list));
   CHECK(!handler.IsEmpty());
   GetProtocolHandlerRegistry()->OnAcceptRegisterProtocolHandler(handler);
 }
 
 ProtocolHandler ProtocolHandlersHandler::ParseHandlerFromArgs(
     const base::ListValue* args) const {
   base::string16 protocol;
   base::string16 url;
   bool ok = args->GetString(0, &protocol) && args->GetString(1, &url);
   if (!ok)
     return ProtocolHandler::EmptyProtocolHandler();
   return ProtocolHandler::CreateProtocolHandler(base::UTF16ToUTF8(protocol),
                                                 GURL(base::UTF16ToUTF8(url)));
 }
 
 void ProtocolHandlersHandler::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   DCHECK_EQ(chrome::NOTIFICATION_PROTOCOL_HANDLER_REGISTRY_CHANGED, type);
   SendHandlersEnabledValue();
   UpdateHandlerList();
 }
 
 }  // namespace settings