Revert of Change base::Value::ListStorage to std::vector<base::Value>

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 408 matching lines @@
   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 =
       nullptr;
   for (const auto& val : *sources) {
     const base::DictionaryValue* dict;
-    CHECK(val.GetAsDictionary(&dict));
+    CHECK(val->GetAsDictionary(&dict));
     power_manager::PowerSupplyProperties_PowerSource* source =
         props.add_available_external_power_source();
     std::string id;
     CHECK(dict->GetString("id", &id));
     source->set_id(id);
     std::string device_type;
     CHECK(dict->GetString("type", &device_type));
     bool dual_role = device_type == "DualRoleUSB";
     source->set_active_by_default(!dual_role);
     if (dual_role)
@@ skipping 193 matching lines @@
 }
 
 void DeviceEmulatorMessageHandler::MouseExists(bool exists) {
   if (!IsJavascriptAllowed())
     return;
   web_ui()->CallJavascriptFunctionUnsafe(kMouseExistsCallback,
                                          base::Value(exists));
 }
 
 }  // namespace chromeos