Refactor PluginService to take PluginList as a dependency.

webkit/plugins/npapi/mock_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/mock_plugin_list.h"
 
 namespace webkit {
 namespace npapi {
 
 MockPluginList::MockPluginList(const PluginGroupDefinition* group_definitions,
                                size_t num_group_definitions) :
     PluginList(group_definitions, num_group_definitions) {
 }
 
 MockPluginList::~MockPluginList() {
 }
 
 void MockPluginList::AddPluginToLoad(const WebPluginInfo& plugin) {
   plugins_to_load_.push_back(plugin);
 }
 
 void MockPluginList::ClearPluginsToLoad() {
   plugins_to_load_.clear();
 }
 
+bool MockPluginList::GetPluginsIfNoRefreshNeeded(
+      std::vector<webkit::WebPluginInfo>* plugins) {
+  GetPlugins(plugins);
+  return true;
+}
+
 void MockPluginList::LoadPluginsInternal(
     ScopedVector<PluginGroup>* plugin_groups) {
   for (size_t i = 0; i < plugins_to_load_.size(); ++i)
     AddToPluginGroups(plugins_to_load_[i], plugin_groups);
 }
 
 }  // npapi
 }  // webkit