Bug 1512813 - Enable the Visual Viewport API on Android. r=kats

Differential Revision: https://phabricator.services.mozilla.com/D30735

--HG--
extra : moz-landing-system : lando

mobile/android/app/geckoview-prefs.js

@@ -32,6 +32,9 @@ pref("dom.push.enabled", false);
 // enable external storage API
 pref("dom.storageManager.enabled", true);
 
+// enable Visual Viewport API
+pref("dom.visualviewport.enabled", true);
+
 // Use containerless scrolling.
 pref("layout.scroll.root-frame-containers", 0);
 

mobile/android/app/mobile.js

@@ -527,6 +527,9 @@ pref("apz.second_tap_tolerance", "0.3");
 pref("apz.touch_move_tolerance", "0.03");
 pref("apz.touch_start_tolerance", "0.06");
 
+// Enable the Visual Viewport API
+pref("dom.visualviewport.enabled", true);
+
 pref("layers.progressive-paint", true);
 pref("layers.low-precision-buffer", true);
 pref("layers.low-precision-resolution", "0.25");