Bug 668157 part.2 mozilla/dom should use mozilla::Preferences r=jst

dom/plugins/ipc/PluginModuleParent.cpp

@@ -41,8 +41,6 @@
 #elif XP_MACOSX
 #include "PluginInterposeOSX.h"
 #include "PluginUtilsOSX.h"
-#include "nsIPrefService.h"
-#include "nsIPrefBranch.h"
 #endif
 #ifdef MOZ_WIDGET_QT
 #include <QtCore/QCoreApplication>
@@ -1163,15 +1161,8 @@ PluginModuleParent::RecvGetNativeCursorsSupported(bool* supported)
 {
     PLUGIN_LOG_DEBUG(("%s", FULLFUNCTION));
 #if defined(XP_MACOSX)
-    bool nativeCursorsSupported = false;
-    nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
-    if (prefs) {
-      if (NS_FAILED(prefs->GetBoolPref("dom.ipc.plugins.nativeCursorSupport",
-          &nativeCursorsSupported))) {
-        nativeCursorsSupported = false;
-      }
-    }
-    *supported = nativeCursorsSupported;
+    *supported =
+      Preferences::GetBool("dom.ipc.plugins.nativeCursorSupport", false);
     return true;
 #else
     NS_NOTREACHED(