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

chrome/browser/extensions/extension_content_settings_apitest.cc

 // 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.
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_content_settings_api.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 99 matching lines @@
   plugin_list.AddPluginToLoad(
       webkit::WebPluginInfo(ASCIIToUTF16(kFooName),
                             FilePath(kFooPath),
                             ASCIIToUTF16("1.2.3"),
                             ASCIIToUTF16("foo")));
   plugin_list.AddPluginToLoad(
       webkit::WebPluginInfo(ASCIIToUTF16(kBarName),
                             FilePath(kBarPath),
                             ASCIIToUTF16("2.3.4"),
                             ASCIIToUTF16("bar")));
-  GetResourceIdentifiersFunction::SetPluginListForTesting(&plugin_list);
+
+  std::vector<webkit::npapi::PluginGroup> groups;
+  plugin_list.GetPluginGroups(true, &groups);
+
+  GetResourceIdentifiersFunction::SetPluginGroupsForTesting(&groups);
 
   EXPECT_TRUE(RunExtensionTest("content_settings/getresourceidentifiers"))
       << message_;
 
-  GetResourceIdentifiersFunction::SetPluginListForTesting(NULL);
+  GetResourceIdentifiersFunction::SetPluginGroupsForTesting(NULL);
 }