Use PluginPrefs in ChromePluginServiceFilter to check whether a plugin is enabled.

chrome/browser/ui/webui/plugins_ui.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 "chrome/browser/ui/webui/plugins_ui.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/memory/singleton.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/plugin_prefs.h"
 #include "chrome/browser/prefs/pref_member.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/webui/chrome_url_data_manager.h"
 #include "chrome/browser/ui/webui/chrome_web_ui_data_source.h"
 #include "chrome/common/chrome_content_client.h"
+#include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/common/notification_service.h"
 #include "grit/browser_resources.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "grit/theme_resources_standard.h"
@@ skipping 108 matching lines @@
   // This pref guards the value whether about:plugins is in the details mode or
   // not.
   BooleanPrefMember show_details_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginsDOMHandler);
 };
 
 PluginsDOMHandler::PluginsDOMHandler()
     : ALLOW_THIS_IN_INITIALIZER_LIST(get_plugins_factory_(this)) {
   registrar_.Add(this,
-                 content::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED,
+                 chrome::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED,
                  NotificationService::AllSources());
 }
 
 WebUIMessageHandler* PluginsDOMHandler::Attach(WebUI* web_ui) {
   PrefService* prefs = web_ui->GetProfile()->GetPrefs();
 
   show_details_.Init(prefs::kPluginsShowDetails, prefs, NULL);
 
   return WebUIMessageHandler::Attach(web_ui);
 }
@@ skipping 75 matching lines @@
 }
 
 void PluginsDOMHandler::HandleGetShowDetails(const ListValue* args) {
   FundamentalValue show_details(show_details_.GetValue());
   web_ui_->CallJavascriptFunction("loadShowDetailsFromPrefs", show_details);
 }
 
 void PluginsDOMHandler::Observe(int type,
                                 const NotificationSource& source,
                                 const NotificationDetails& details) {
-  DCHECK_EQ(content::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED, type);
+  DCHECK_EQ(chrome::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED, type);
   LoadPlugins();
 }
 
 void PluginsDOMHandler::LoadPluginsOnFileThread(
     std::vector<webkit::npapi::PluginGroup>* groups,
     Task* task) {
   webkit::npapi::PluginList::Singleton()->GetPluginGroups(true, groups);
 
   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, task);
   BrowserThread::PostTask(
@@ skipping 72 matching lines @@
   prefs->RegisterBooleanPref(prefs::kPluginsEnabledInternalPDF,
                              false,
                              PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kPluginsShowDetails,
                              false,
                              PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kPluginsShowSetReaderDefaultInfobar,
                              true,
                              PrefService::UNSYNCABLE_PREF);
 }