Bug 1177399 - Enable AudioChannelService in desktop by default. r=ehsan

mobile/android/app/mobile.js

@@ -800,9 +800,6 @@ pref("dom.phonenumber.substringmatching.BR", 8);
 pref("dom.phonenumber.substringmatching.CO", 10);
 pref("dom.phonenumber.substringmatching.VE", 7);
 
-// Support for the mozAudioChannel attribute on media elements is disabled in non-webapps
-pref("media.useAudioChannelService", false);
-
 // Enable hardware-accelerated Skia canvas
 pref("gfx.canvas.azure.backends", "skia");
 pref("gfx.canvas.azure.accelerated", true);

modules/libpref/init/all.js

@@ -4991,3 +4991,8 @@ pref("memory.report_concurrency", 1);
 // Desktop probably doesn't have swapped-out children like that.
 pref("memory.report_concurrency", 10);
 #endif
+
+// Make <audio>, <video>, NPAPI plugins and webAudio talk to the AudioChannelService.
+pref("media.useAudioChannelService", true);
+// Add Mozilla AudioChannel APIs.
+pref("media.useAudioChannelAPI", false);