Ensure video poster preloads use the crossorigin attribute

third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2009 Torch Mobile, Inc. http://www.torchmobile.com/
  * Copyright (C) 2010 Google 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.
@@ skipping 390 matching lines @@
       m_matched &= MIMETypeRegistry::isSupportedImagePrefixedMIMEType(
           ContentType(attributeValue).type());
     }
   }
 
   template <typename NameType>
   void processVideoAttribute(const NameType& attributeName,
                              const String& attributeValue) {
     if (match(attributeName, posterAttr))
       setUrlToLoad(attributeValue, DisallowURLReplacement);
+    else if (match(attributeName, crossoriginAttr))
+      setCrossOrigin(attributeValue);
   }
 
   template <typename NameType>
   void processAttribute(const NameType& attributeName,
                         const String& attributeValue) {
     if (match(attributeName, charsetAttr))
       m_charset = attributeValue;
 
     if (match(m_tagImpl, scriptTag))
       processScriptAttribute(attributeName, attributeValue);
@@ skipping 480 matching lines @@
   defaultViewportMinWidth = document->viewportDefaultMinWidth();
   viewportMetaZeroValuesQuirk =
       document->settings() &&
       document->settings()->viewportMetaZeroValuesQuirk();
   viewportMetaEnabled =
       document->settings() && document->settings()->viewportMetaEnabled();
   referrerPolicy = document->getReferrerPolicy();
 }
 
 }  // namespace blink