Bug 1123535 - Enable dormant heuristic for MP4Reader. r=kentuckyfriedtakahe

modules/libpref/init/all.js

@@ -262,6 +262,11 @@ pref("media.wakelock_timeout", 2000);
 // opened as top-level documents, as opposed to inside a media element.
 pref("media.play-stand-alone", true);
 
+#if defined(XP_WIN)
+pref("media.decoder.heuristic.dormant.enabled", true);
+pref("media.decoder.heuristic.dormant.timeout", 60000);
+#endif
+
 #ifdef MOZ_WMF
 pref("media.windows-media-foundation.enabled", true);
 pref("media.windows-media-foundation.use-dxva", true);

testing/profiles/prefs_general.js

@@ -284,6 +284,10 @@ user_pref("browser.search.countryCode", "US");
 
 user_pref("media.eme.enabled", true);
 
+#if defined(XP_WIN)
+user_pref("media.decoder.heuristic.dormant.timeout", 0);
+#endif
+
 // Don't prompt about e10s
 user_pref("browser.displayedE10SPrompt.1", 5);
 // Don't use auto-enabled e10s