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

webkit/plugins/npapi/plugin_list.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 "webkit/plugins/npapi/plugin_list.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 426 matching lines @@
         return;
     }
   }
 
   base::AutoLock lock(lock_);
   AddToPluginGroups(plugin_info, plugin_groups);
 }
 
 void PluginList::GetPlugins(std::vector<WebPluginInfo>* plugins) {
   LoadPlugins();
+  GetCachedPlugins(plugins);
+}
+
+void PluginList::GetCachedPlugins(std::vector<webkit::WebPluginInfo>* plugins) {
   base::AutoLock lock(lock_);
   for (size_t i = 0; i < plugin_groups_.size(); ++i) {
     const std::vector<webkit::WebPluginInfo>& gr_plugins =
         plugin_groups_[i]->web_plugin_infos();
     plugins->insert(plugins->end(), gr_plugins.begin(), gr_plugins.end());
   }
 }
 
 void PluginList::GetPluginInfoArray(
     const GURL& url,
@@ skipping 203 matching lines @@
   }
   return false;
 }
 
 PluginList::~PluginList() {
 }
 
 
 }  // namespace npapi
 }  // namespace webkit