Call willInsertBody() in MediaDocument::createDocumentStructure()

third_party/WebKit/Source/core/html/MediaDocument.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 126 matching lines @@
   source->setSrc(document()->url());
 
   if (DocumentLoader* loader = document()->loader())
     source->setType(loader->responseMIMEType());
 
   media->appendChild(source);
 
   HTMLBodyElement* body = HTMLBodyElement::create(*document());
   body->setAttribute(styleAttr, "margin: 0px;");
 
+  document()->willInsertBody();
+
   HTMLDivElement* div = HTMLDivElement::create(*document());
   // Style sheets for media controls are lazily loaded until a media element is
   // encountered.  As a result, elements encountered before the media element
   // will not get the right style at first if we put the styles in
   // mediacontrols.css. To solve this issue, set the styles inline so that they
   // will be applied when the page loads.  See w3c example on how to centering
   // an element: https://www.w3.org/Style/Examples/007/center.en.html
   div->setAttribute(styleAttr,
                     "display: flex;"
                     "flex-direction: column;"
@@ skipping 94 matching lines @@
     if (keyboardEvent->key() == " " ||
         keyboardEvent->keyCode() == VKEY_MEDIA_PLAY_PAUSE) {
       // space or media key (play/pause)
       video->togglePlayState();
       event->setDefaultHandled();
     }
   }
 }
 
 }  // namespace blink