Make Use of Value::GetList API

chrome/browser/ui/webui/chromeos/emulator/device_emulator_message_handler.cc

 // Copyright 2015 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/chromeos/emulator/device_emulator_message_handler.h"
 
 #include <stdint.h>
 #include <utility>
 
 #include "ash/shell.h"
@@ skipping 393 matching lines @@
   if (args->GetInteger(0, &new_time)) {
     power_manager::PowerSupplyProperties props =
         fake_power_manager_client_->props();
     props.set_battery_time_to_full_sec(new_time);
     fake_power_manager_client_->UpdatePowerProperties(props);
   }
 }
 
 void DeviceEmulatorMessageHandler::UpdatePowerSources(
     const base::ListValue* args) {
-  const base::ListValue* sources;
-  CHECK(args->GetList(0, &sources));
+  const base::ListValue* sources =
+      static_cast<const base::ListValue*>(&args->base::Value::GetList()[0]);
   power_manager::PowerSupplyProperties props =
       fake_power_manager_client_->props();
 
   std::string selected_id = props.external_power_source_id();
 
   props.clear_available_external_power_source();
   props.set_external_power_source_id("");
 
   // Try to find the previously selected source in the list.
   const power_manager::PowerSupplyProperties_PowerSource* selected_source =
@@ skipping 207 matching lines @@
 }
 
 void DeviceEmulatorMessageHandler::MouseExists(bool exists) {
   if (!IsJavascriptAllowed())
     return;
   web_ui()->CallJavascriptFunctionUnsafe(kMouseExistsCallback,
                                          base::Value(exists));
 }
 
 }  // namespace chromeos