Bug 783644 - Part 1: Flip a pref so B2G ignores dialog=1 in window.open, like we do on other mobile platforms. r=smaug

b2g/app/b2g.js

@@ -515,3 +515,6 @@ pref("hal.processPriorityManager.gonk.backgroundNice", 10);
 pref("dom.ipc.processPrelauch.enabled", true);
 // Wait this long before pre-launching a new subprocess.
 pref("dom.ipc.processPrelauch.delayMs", 1000);
+
+// Ignore the "dialog=1" feature in window.open.
+pref("dom.disable_window_open_dialog_feature", true);