Bug 769117 - Rewrite youtube flash embed tags to possibly use HTML5; r=bz r=hsivonen

dom/html/HTMLSharedObjectElement.cpp

@@ -345,6 +345,11 @@ HTMLSharedObjectElement::GetCapabilities() const
   if (mNodeInfo->Equals(nsGkAtoms::embed)) {
     capabilities |= eSupportSVG | eSupportImages;
   }
+  // If this is a rewritten youtube flash embed, add documents to capabilities
+  // so that we can render HTML5 if possible.
+  if (mRewrittenYoutubeEmbed) {
+    capabilities |= eSupportDocuments;
+  }
 
   return capabilities;
 }