From 0f0c5a85956695c291aa4a3961636cfab81a02c2 Mon Sep 17 00:00:00 2001
From: Andreas Pehrson <apehrson@mozilla.com>
Date: Tue, 11 Jun 2019 11:48:21 +0000
Subject: [PATCH] Bug 1554699 - HTMLMediaElement.preload: Ignore setting and
 always get "none" when playing a MediaStream. r=jib

Differential Revision: https://phabricator.services.mozilla.com/D33096

--HG--
extra : moz-landing-system : lando
---
 dom/html/HTMLMediaElement.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dom/html/HTMLMediaElement.h b/dom/html/HTMLMediaElement.h
index d27d406e9630..22f2a3a88886 100644
--- a/dom/html/HTMLMediaElement.h
+++ b/dom/html/HTMLMediaElement.h
@@ -436,9 +436,16 @@ class HTMLMediaElement : public nsGenericHTMLElement,
   void NotifyAudioPlaybackChanged(AudibleChangedReasons aReason);
 
   void GetPreload(nsAString& aValue) {
+    if (mSrcAttrStream) {
+      nsGkAtoms::none->ToString(aValue);
+      return;
+    }
     GetEnumAttr(nsGkAtoms::preload, nullptr, aValue);
   }
   void SetPreload(const nsAString& aValue, ErrorResult& aRv) {
+    if (mSrcAttrStream) {
+      return;
+    }
     SetHTMLAttr(nsGkAtoms::preload, aValue, aRv);
   }