Refactor PluginService to take PluginList as a dependency.

webkit/plugins/npapi/mock_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_MOCK_PLUGIN_LIST_H_
 #define WEBKIT_PLUGINS_NPAPI_MOCK_PLUGIN_LIST_H_
 
 #include "webkit/plugins/npapi/plugin_list.h"
 
 namespace webkit {
 namespace npapi {
 
 // A PluginList for tests that avoids file system IO. There is also no reason
 // to use |lock_| (but it doesn't hurt either).
 class MockPluginList : public PluginList {
  public:
   MockPluginList(const PluginGroupDefinition* group_definitions,
                  size_t num_group_definitions);
   virtual ~MockPluginList();
 
   void AddPluginToLoad(const WebPluginInfo& plugin);
   void ClearPluginsToLoad();
 
+  // PluginList:
+  virtual bool GetPluginsIfNoRefreshNeeded(
+      std::vector<webkit::WebPluginInfo>* plugins) OVERRIDE;
+
  private:
   std::vector<WebPluginInfo> plugins_to_load_;
 
   // PluginList methods:
   virtual void LoadPluginsInternal(
       ScopedVector<PluginGroup>* plugin_groups) OVERRIDE;
 };
 
 }  // npapi
 }  // webkit
 
 #endif  // WEBKIT_PLUGINS_NPAPI_MOCK_PLUGIN_LIST_H_