Bug 1837813 - Remove unused media.* prefs r=geckoview-reviewers,m_kato

Differential Revision: https://phabricator.services.mozilla.com/D180600

dom/media/test/test_can_play_type_mpeg.html

@@ -145,8 +145,7 @@
 var haveMp4 =
   getPref("media.wmf.enabled") ||
   IsMacOS() ||
-  (IsSupportedAndroid() &&
-    (IsJellyBeanOrLater() || getPref("media.plugins.enabled"))) ||
+  IsSupportedAndroid() ||
   (IsLinux() && getPref("media.ffmpeg.enabled"));
 
 check_mp4(document.getElementById('v'), haveMp4);
@@ -155,8 +154,7 @@
   getPref("media.wmf.enabled") ||
   (IsLinux() && getPref("media.ffmpeg.enabled")) ||
   (IsSupportedAndroid() &&
-    ((IsJellyBeanOrLater() && getPref("media.android-media-codec.enabled")) ||
-      getPref("media.plugins.enabled"))) ||
+    ((IsJellyBeanOrLater() && getPref("media.android-media-codec.enabled")))) ||
   IsMacOS();
 
 check_mp3(document.getElementById('v'), haveMp3);

mobile/android/app/mobile.js

@@ -305,8 +305,6 @@ pref("urlclassifier.malwareTable", "goog-harmful-proto,goog-unwanted-proto,mozte
 pref("browser.dom.window.dump.enabled", true);
 pref("devtools.console.stdout.chrome", true);
 
-pref("media.realtime_decoder.enabled", true);
-
 pref("full-screen-api.enabled", true);
 
 // Transmit UDP busy-work to the LAN when anticipating low latency
@@ -316,15 +314,6 @@ pref("network.tickle-wifi.enabled", true);
 // Mobile manages state by autodetection
 pref("network.manage-offline-status", true);
 
-// Media plugins for libstagefright playback on android
-pref("media.plugins.enabled", true);
-
-// Stagefright's OMXCodec::CreationFlags. The interesting flag values are:
-//  0 = Let Stagefright choose hardware or software decoding (default)
-//  8 = Force software decoding
-// 16 = Force hardware decoding
-pref("media.stagefright.omxcodec.flags", 0);
-
 // Hide common parts of URLs like "www." or "http://"
 pref("browser.urlbar.trimURLs", true);
 
@@ -401,8 +390,6 @@ pref("dom.push.maxRecentMessageIDsPerSubscription", 0);
 
 pref("dom.audiochannel.mediaControl", true);
 
-pref("media.openUnsupportedTypeWithExternalApp", true);
-
 // Ask for permission when enumerating WebRTC devices.
 pref("media.navigator.permission.device", true);
 

testing/profiles/reftest/user.js

@@ -61,7 +61,6 @@ user_pref("layout.testing.overlay-scrollbars.always-visible", true);
 // way to guarantee it's loaded by the time we take the reftest screenshot.
 user_pref("layout.image.eager_broken_image_icon", true);
 user_pref("media.gmp-manager.url.override", "http://localhost/dummy-gmp-manager.xml");
-user_pref("media.openUnsupportedTypeWithExternalApp", false);
 // Reftests load a lot of URLs very quickly. This puts avoidable and
 // unnecessary I/O pressure on the Places DB (measured to be in the
 // gigabytes).

testing/profiles/unittest-required/user.js

@@ -159,7 +159,6 @@ user_pref("media.hls.server.url", "http://{server}/tests/dom/media/test/hls");
 user_pref("media.libavcodec.allow-obsolete", true);
 user_pref("media.memory_cache_max_size", 32);
 user_pref("media.memory_caches_combined_limit_kb", 256);
-user_pref("media.openUnsupportedTypeWithExternalApp", false);
 user_pref("media.preload.auto", 3); // auto = enough
 user_pref("media.preload.default", 2); // default = metadata
 user_pref("media.preload.default.cellular", 2); // default = metadata