Enable Advanced Layers for Nightly users on Windows 7. (bug 1379731, r=milan)

modules/libpref/init/all.js

@@ -5795,14 +5795,15 @@ pref("fuzzing.enabled", false);
 #if defined(XP_WIN)
 #if defined(NIGHTLY_BUILD)
 pref("layers.mlgpu.dev-enabled", true);
-#else
-pref("layers.mlgpu.dev-enabled", false);
-#endif
 
 // Both this and the master "enabled" pref must be on to use Advanced Layers
 // on Windows 7.
+pref("layers.mlgpu.enable-on-windows7", true);
+#else
+pref("layers.mlgpu.dev-enabled", false);
 pref("layers.mlgpu.enable-on-windows7", false);
 #endif
+#endif
 
 // Set advanced layers preferences here to have them show up in about:config or
 // to be overridable in reftest.list files. They should pretty much all be set