Expose Document::isPrivilegedContext from WebDocument

public/web/WebDocument.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 58 matching lines @@
     WebDocument& operator=(const WebDocument& e)
     {
         WebNode::assign(e);
         return *this;
     }
     void assign(const WebDocument& e) { WebNode::assign(e); }
 
     BLINK_EXPORT WebURL url() const;
     // Note: Security checks should use the securityOrigin(), not url().
     BLINK_EXPORT WebSecurityOrigin securityOrigin() const;
+    BLINK_EXPORT bool isPrivilegedContext(WebString& errorMessage);
 
     BLINK_EXPORT WebString encoding() const;
     BLINK_EXPORT WebString contentLanguage() const;
     BLINK_EXPORT WebString referrer() const;
     BLINK_EXPORT WebColor themeColor() const;
     // The url of the OpenSearch Desription Document (if any).
     BLINK_EXPORT WebURL openSearchDescriptionURL() const;
 
     // Returns the frame the document belongs to or 0 if the document is frameless.
     BLINK_EXPORT WebLocalFrame* frame() const;
@@ skipping 63 matching lines @@
 #if BLINK_IMPLEMENTATION
     WebDocument(const PassRefPtrWillBeRawPtr<Document>&);
     WebDocument& operator=(const PassRefPtrWillBeRawPtr<Document>&);
     operator PassRefPtrWillBeRawPtr<Document>() const;
 #endif
 };
 
 } // namespace blink
 
 #endif