Bug 1390247 - Enable APZ autoscrolling on Nightly builds. r=kats

MozReview-Commit-ID: 1pBVbb2XVeW

--HG--
extra : rebase_source : 30d917e521bf7bf1813408d2b209feb196d89151

modules/libpref/init/all.js

@@ -672,7 +672,11 @@ pref("layers.geometry.d3d11.enabled", true);
 pref("apz.allow_checkerboarding", true);
 pref("apz.allow_immediate_handoff", true);
 pref("apz.allow_zooming", false);
+#ifdef NIGHTLY_BUILD
+pref("apz.autoscroll.enabled", true);
+#else
 pref("apz.autoscroll.enabled", false);
+#endif
 
 // Whether to lock touch scrolling to one axis at a time
 // 0 = FREE (No locking at all)