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

content/browser/renderer_host/buffered_resource_handler.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 CONTENT_BROWSER_RENDERER_HOST_BUFFERED_RESOURCE_HANDLER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_BUFFERED_RESOURCE_HANDLER_H_
 #pragma once
 
 #include <string>
 
 #include "content/browser/renderer_host/resource_handler.h"
 
 class MessageLoop;
 class ResourceDispatcherHost;
 
 namespace net {
 class URLRequest;
 }  // namespace net
 
+namespace webkit {
+struct WebPluginInfo;
+}
+
 // Used to buffer a request until enough data has been received.
 class BufferedResourceHandler : public ResourceHandler {
  public:
   BufferedResourceHandler(ResourceHandler* handler,
                           ResourceDispatcherHost* host,
                           net::URLRequest* request);
 
   // ResourceHandler implementation:
   virtual bool OnUploadProgress(int request_id, uint64 position, uint64 size);
   virtual bool OnRequestRedirected(int request_id, const GURL& new_url,
@@ skipping 32 matching lines @@
   // that means that the check couldn't be fully done because the plugins aren't
   // loaded.  The function should be called again after the plugin list is
   // loaded.
   bool ShouldDownload(bool* need_plugin_list);
 
   // Informs the original ResourceHandler |real_handler_| that the response will
   // be handled entirely by the new ResourceHandler |handler|.
   // A reference to |handler| is acquired.
   void UseAlternateResourceHandler(int request_id, ResourceHandler* handler);
 
-  // Called on the file thread to load the list of plugins.
-  void LoadPlugins();
-
   // Called on the IO thread once the list of plugins has been loaded.
-  void OnPluginsLoaded();
+  void OnPluginsLoaded(const std::vector<webkit::WebPluginInfo>& plugins);
 
   scoped_refptr<ResourceHandler> real_handler_;
   scoped_refptr<ResourceResponse> response_;
   ResourceDispatcherHost* host_;
   net::URLRequest* request_;
   scoped_refptr<net::IOBuffer> read_buffer_;
   scoped_refptr<net::IOBuffer> my_buffer_;
   int read_buffer_size_;
   int bytes_read_;
   bool sniff_content_;
   bool wait_for_plugins_;
   bool buffering_;
   bool finished_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferedResourceHandler);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_BUFFERED_RESOURCE_HANDLER_H_