Backed out 2 changesets (bug 1658469) for assertion failures on nsVideoFrame.cpp. CLOSED TREE

Backed out changeset 08a78618c76c (bug 1658469)
Backed out changeset 5c8a07fc83ed (bug 1658469)

dom/base/ShadowRoot.cpp

@@ -95,10 +95,6 @@ JSObject* ShadowRoot::WrapNode(JSContext* aCx,
 }
 
 void ShadowRoot::CloneInternalDataFrom(ShadowRoot* aOther) {
-  if (aOther->IsUAWidget()) {
-    SetIsUAWidget();
-  }
-
   size_t sheetCount = aOther->SheetCount();
   for (size_t i = 0; i < sheetCount; ++i) {
     StyleSheet* sheet = aOther->SheetAt(i);

layout/base/tests/chrome/printpreview_helper.xhtml

@@ -424,7 +424,7 @@ async function compareFiles(src1, src2, options = {}) {
 
   await new Promise((resolve) => {
     iframeElement.addEventListener("load", resolve, { capture: true, once: true });
-    iframeElement.setAttribute("src", new URL(src1, BASE).href);
+    iframeElement.setAttribute("src", BASE + src1);
   });
 
   if (messagePromise) {
@@ -438,7 +438,7 @@ async function compareFiles(src1, src2, options = {}) {
 
   await new Promise((resolve) => {
     iframeElement.addEventListener("load", resolve, { capture: true, once: true });
-    iframeElement.setAttribute("src", new URL(src2, BASE).href);
+    iframeElement.setAttribute("src", BASE + src2);
   });
 
   await printpreview(options.ref || options);
@@ -551,11 +551,6 @@ async function runTest20() {
 
   exitprintpreview();
 
-  requestAnimationFrame(() => setTimeout(runTest21));
-}
-
-async function runTest21() {
-  await compareFiles("data:text/html,<audio controls>", "data:text/html,<audio controls >"); // Shouldn't crash.
   finish();
 }