Refactor PluginService to take PluginList as a dependency.

content/test/test_plugin_service.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 "content/test/test_plugin_service.h"
+
+#include "base/bind.h"
+#include "base/message_loop.h"
+#include "webkit/plugins/npapi/plugin_group.h"
+#include "webkit/plugins/npapi/plugin_list.h"
+#include "webkit/plugins/webplugininfo.h"
+
+TestPluginService::TestPluginService(webkit::npapi::PluginList* plugin_list)
+    : PluginService(plugin_list) {
+  // Reset the callback so that tests don't trip the assertion set by the
+  // base class.
+  plugin_list->set_will_load_plugins_callback(base::Closure());
+}
+
+TestPluginService::~TestPluginService() {
+}
+
+void TestPluginService::GetPlugins(const GetPluginsCallback& cb) {
+  std::vector<webkit::WebPluginInfo> plugins;
+  plugin_list()->GetPlugins(&plugins);
+  MessageLoop::current()->PostTask(FROM_HERE, base::Bind(cb, plugins));
+}
+
+void TestPluginService::GetPluginGroups(const GetPluginGroupsCallback& cb) {
+  std::vector<webkit::npapi::PluginGroup> groups;
+  plugin_list()->GetPluginGroups(true, &groups);
+  MessageLoop::current()->PostTask(FROM_HERE, base::Bind(cb, groups));
+}