Bug 1220629 - Part 8: Enable native PushLayer/PopLayer by default on Windows and Linux. r=jrmuizel

--HG--
extra : rebase_source : 053b4b68504b847ba39bc562ff12c98be259d6a0

modules/libpref/init/all.js

@@ -4356,12 +4356,15 @@ pref("gfx.apitrace.enabled",false);
 #endif
 
 #ifdef MOZ_X11
+pref("gfx.content.use-native-pushlayer", true);
 #ifdef MOZ_WIDGET_GTK
 pref("gfx.xrender.enabled",true);
 #endif
 #endif
 
 #ifdef XP_WIN
+pref("gfx.content.use-native-pushlayer", true);
+
 // Whether to disable the automatic detection and use of direct2d.
 pref("gfx.direct2d.disabled", false);
 pref("gfx.direct2d.use1_1", true);