--- a/dom/media/MediaFormatReader.cpp
+++ b/dom/media/MediaFormatReader.cpp
@@ -380,23 +380,17 @@ MediaFormatReader::EnsureDecodersCreated
     if (IsEncrypted()) {
 #ifdef MOZ_EME
       // We have encrypted audio or video. We'll need a CDM to decrypt and
       // possibly decode this. Wait until we've received a CDM from the
       // JavaScript player app. Note: we still go through the motions here
       // even if EME is disabled, so that if script tries and fails to create
       // a CDM, we can detect that and notify chrome and show some UI
       // explaining that we failed due to EME being disabled.
-      {
-        MOZ_ASSERT(mCDMProxy);
-        CDMCaps::AutoLock caps(mCDMProxy->Capabilites());
-        mInfo.mVideo.mIsRenderedExternally = caps.CanRenderVideo();
-        mInfo.mAudio.mIsRenderedExternally = caps.CanRenderAudio();
-      }
-
+      MOZ_ASSERT(mCDMProxy);
       mPlatform = PlatformDecoderModule::CreateCDMWrapper(mCDMProxy);
       NS_ENSURE_TRUE(mPlatform, false);
 #else
       // EME not supported.
       return false;
 #endif
     } else {
       mPlatform = PlatformDecoderModule::Create();