Bug 1329817 - Enable V4 lookups. r=francois

After this patch is introduced, url-classifier will return merged classify result
from V2 and V4.

--HG--
extra : rebase_source : 1940f8617547878b87a5808479ef9d46e6722a92

modules/libpref/init/all.js

@@ -5291,7 +5291,11 @@ pref("browser.safebrowsing.id", "navclient-auto-ffox");
 pref("browser.safebrowsing.id", "Firefox");
 #endif
 
+#ifdef NIGHTLY_BUILD
+pref("browser.safebrowsing.temporary.take_v4_completion_result", true);
+#else
 pref("browser.safebrowsing.temporary.take_v4_completion_result", false);
+#endif
 
 // Turn off Spatial navigation by default.
 pref("snav.enabled", false);