Bug 1317801 - Enable Mac remote printing in 52; r=bobowen

Enable remote printing for Mac by setting print.print_via_parent=true by default.

MozReview-Commit-ID: DKiMJPiIO0n

--HG--
extra : rebase_source : 1f19477914ab946a099c238b06a34fa84c8952c5

modules/libpref/init/all.js

@@ -1111,10 +1111,7 @@ pref("print.print_edge_right", 0);
 pref("print.print_edge_bottom", 0);
 
 // Print via the parent process. This is only used when e10s is enabled.
-// For Mac, limit to Nightly.
-#if defined(XP_WIN)
-pref("print.print_via_parent", true);
-#elif defined(XP_MACOSX) && defined(NIGHTLY_BUILD)
+#if defined(XP_WIN) || defined(XP_MACOSX)
 pref("print.print_via_parent", true);
 #else
 pref("print.print_via_parent", false);