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

chrome/browser/plugin_data_remover_helper.cc

Index: chrome/browser/plugin_data_remover_helper.cc
diff --git a/chrome/browser/plugin_data_remover_helper.cc b/chrome/browser/plugin_data_remover_helper.cc
index 4636b73243d9e0ab5e7d01dc729a94dab86067fc..c54daa98e6c69810996c758fb9c74d94bcb75dde 100644
--- a/chrome/browser/plugin_data_remover_helper.cc
+++ b/chrome/browser/plugin_data_remover_helper.cc
@@ -10,6 +10,7 @@
 #include "chrome/browser/plugin_data_remover.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/common/chrome_notification_types.h"
 #include "content/browser/browser_thread.h"
 #include "content/common/notification_service.h"
 
@@ -74,7 +75,7 @@ void PluginDataRemoverHelper::Init(const char* pref_name,
                                    PrefService* prefs,
                                    NotificationObserver* observer) {
   pref_.Init(pref_name, prefs, observer);
-  registrar_.Add(this, content::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED,
+  registrar_.Add(this, chrome::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED,
                  NotificationService::AllSources());
   internal_ = make_scoped_refptr(new Internal(pref_name, prefs));
   internal_->StartUpdate();
@@ -83,7 +84,7 @@ void PluginDataRemoverHelper::Init(const char* pref_name,
 void PluginDataRemoverHelper::Observe(int type,
                                       const NotificationSource& source,
                                       const NotificationDetails& details) {
-  if (type == content::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED) {
+  if (type == chrome::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED) {
     internal_->StartUpdate();
   } else {
     NOTREACHED();