Change media document to no-quirks mode

Better for layout.

Bug: 1131185
Change-Id: Icdbdab4906bd27afd30b0602f608939272e75aa4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2424980
Auto-Submit: Mason Freed <masonfreed@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810470}

third_party/blink/renderer/core/html/media/media_document.cc

@@ -121,7 +121,7 @@ void MediaDocumentParser::Finish() {
 
 MediaDocument::MediaDocument(const DocumentInit& initializer)
     : HTMLDocument(initializer, kMediaDocumentClass) {
-  SetCompatibilityMode(kQuirksMode);
+  SetCompatibilityMode(kNoQuirksMode);
   LockCompatibilityMode();
 
   // Set the autoplay policy to kNoUserGestureRequired.