Convert the PluginService interface to be an async wrapper around PluginList.

chrome/browser/automation/testing_automation_provider.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_AUTOMATION_TESTING_AUTOMATION_PROVIDER_H_
 #define CHROME_BROWSER_AUTOMATION_TESTING_AUTOMATION_PROVIDER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 474 matching lines @@
   // for example response.
   void GetInitialLoadTimes(Browser* browser,
                            base::DictionaryValue* args,
                            IPC::Message* reply_message);
 
   // Get info about plugins.
   // Uses the JSON interface for input/output.
   void GetPluginsInfo(Browser* browser,
                       base::DictionaryValue* args,
                       IPC::Message* reply_message);
+  void GetPluginsInfoCallback(Browser* browser,
+      base::DictionaryValue* args,
+      IPC::Message* reply_message);
 
   // Enable a plugin.
   // Uses the JSON interface for input/output.
   void EnablePlugin(Browser* browser,
                     base::DictionaryValue* args,
                     IPC::Message* reply_message);
 
   // Disable a plugin.
   // Uses the JSON interface for input/output.
   void DisablePlugin(Browser* browser,
@@ skipping 837 matching lines @@
   // Used to enumerate browser profiles.
   scoped_refptr<ImporterList> importer_list_;
 
   // The stored data for the ImportSettings operation.
   ImportSettingsData import_settings_data_;
 
   DISALLOW_COPY_AND_ASSIGN(TestingAutomationProvider);
 };
 
 #endif  // CHROME_BROWSER_AUTOMATION_TESTING_AUTOMATION_PROVIDER_H_