Refactor PluginService to take PluginList as a dependency.

webkit/plugins/npapi/plugin_list.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 WEBKIT_PLUGINS_NPAPI_PLUGIN_LIST_H_
 #define WEBKIT_PLUGINS_NPAPI_PLUGIN_LIST_H_
 
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 108 matching lines @@
       const std::string& mime_types,
       const std::string& file_extensions,
       const string16& mime_type_descriptions,
       std::vector<webkit::WebPluginMimeType>* parsed_mime_types);
 
   // Get all the plugins synchronously.
   void GetPlugins(std::vector<webkit::WebPluginInfo>* plugins);
 
   // Returns true if the list of plugins is cached and is copied into the out
   // pointer; returns false if the plugin list needs to be refreshed.
-  bool GetPluginsIfNoRefreshNeeded(std::vector<webkit::WebPluginInfo>* plugins);
+  virtual bool GetPluginsIfNoRefreshNeeded(
+      std::vector<webkit::WebPluginInfo>* plugins);
 
   // Returns a list in |info| containing plugins that are found for
   // the given url and mime type (including disabled plugins, for
   // which |info->enabled| is false).  The mime type which corresponds
   // to the URL is optionally returned back in |actual_mime_types| (if
   // it is non-NULL), one for each of the plugin info objects found.
   // The |allow_wildcard| parameter controls whether this function
   // returns plugins which support wildcard mime types (* as the mime
   // type).  The |info| parameter is required to be non-NULL.  The
   // list is in order of "most desirable" to "least desirable",
@@ skipping 157 matching lines @@
   // Set to true if the default plugin is enabled.
   bool default_plugin_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginList);
 };
 
 }  // namespace npapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_NPAPI_PLUGIN_LIST_H_