fix: Reject TS content on all platforms and transmux always (#6382)

Related to #6334
Related to
#6320 (comment)
Also reverts #6045
since now it is not necessary

lib/polyfill/mediasource.js

@@ -32,12 +32,6 @@ shaka.polyfill.MediaSource = class {
 
     if (!window.MediaSource && !window.ManagedMediaSource) {
       shaka.log.info('No MSE implementation available.');
-    } else if (shaka.util.Platform.isChromecast()) {
-      shaka.log.info('Patching Chromecast MSE bugs.');
-      // Chromecast fails on some TS content, even though it is supposed to
-      // support it.  Better to transmux.
-      // See https://github.com/shaka-project/shaka-player/issues/5278
-      shaka.polyfill.MediaSource.rejectContainer_('mp2t');
     } else if (safariVersion) {
       // NOTE:  shaka.Player.isBrowserSupported() has its own restrictions on
       // Safari version.
@@ -73,11 +67,6 @@ shaka.polyfill.MediaSource = class {
         // Bug filed: https://bugs.webkit.org/show_bug.cgi?id=165342
         shaka.polyfill.MediaSource.stubAbort_();
       }
-    } else if (shaka.util.Platform.isEdge()) {
-      shaka.log.info('Rejecting TS container.');
-      // TS content is broken on Edge in general.
-      // See https://github.com/shaka-project/shaka-player/issues/4955
-      shaka.polyfill.MediaSource.rejectContainer_('mp2t');
     } else if (shaka.util.Platform.isTizen2() ||
         shaka.util.Platform.isTizen3() ||
         shaka.util.Platform.isTizen4()) {
@@ -90,6 +79,14 @@ shaka.polyfill.MediaSource = class {
       shaka.log.info('Using native MSE as-is.');
     }
 
+    if (window.MediaSource || window.ManagedMediaSource) {
+      // TS content is broken on all browsers in general.
+      // See https://github.com/shaka-project/shaka-player/issues/4955
+      // See https://github.com/shaka-project/shaka-player/issues/5278
+      // See https://github.com/shaka-project/shaka-player/issues/6334
+      shaka.polyfill.MediaSource.rejectContainer_('mp2t');
+    }
+
     if (window.MediaSource &&
         MediaSource.isTypeSupported('video/webm; codecs="vp9"') &&
         !MediaSource.isTypeSupported('video/webm; codecs="vp09.00.10.08"')) {