Remove prefixed EME.

content/child/runtime_features.cc

Index: content/child/runtime_features.cc
diff --git a/content/child/runtime_features.cc b/content/child/runtime_features.cc
index b9fed49d30ab6f9e58bc32de6c3c7992254b49d5..3bdd9739f8fa86956a526f5d59aa9cf4effa60b7 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -33,7 +33,6 @@ static void SetRuntimeFeatureDefaultsForPlatform() {
 #if defined(OS_ANDROID)
   // EME implementation needs Android MediaCodec API.
   if (!media::MediaCodecUtil::IsMediaCodecAvailable()) {
-    WebRuntimeFeatures::enablePrefixedEncryptedMedia(false);
     WebRuntimeFeatures::enableEncryptedMedia(false);
   }
 
@@ -104,12 +103,6 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
   if (command_line.HasSwitch(switches::kDisableSpeechAPI))
     WebRuntimeFeatures::enableScriptedSpeech(false);
 
-  if (command_line.HasSwitch(switches::kDisableEncryptedMedia))
-    WebRuntimeFeatures::enableEncryptedMedia(false);
-
-  if (command_line.HasSwitch(switches::kEnablePrefixedEncryptedMedia))
-    WebRuntimeFeatures::enablePrefixedEncryptedMedia(true);
-
   if (command_line.HasSwitch(switches::kDisableFileSystem))
     WebRuntimeFeatures::enableFileSystem(false);