bug 876070 - re-enable graphite shaping on mobile by default. r=kats

mobile/android/app/mobile.js

@@ -357,11 +357,6 @@ pref("gfx.displayport.strategy_vb.danger_y_incr", -1); // additional danger zone
 // prediction bias strategy options
 pref("gfx.displayport.strategy_pb.threshold", -1); // velocity threshold in inches/frame
 
-// disable Graphite font shaping by default on Android until memory footprint
-// of using the Charis SIL fonts that we ship with the product is addressed
-// (see bug 700023, bug 846832, bug 847344)
-pref("gfx.font_rendering.graphite.enabled", false);
-
 // don't allow JS to move and resize existing windows
 pref("dom.disable_window_move_resize", true);