Enforce referrer policies for workers

Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 264 matching lines @@
     DEFINE_ATTRIBUTE_EVENT_LISTENER(wheel);
 
     bool shouldMergeWithLegacyDescription(ViewportDescription::Type);
     bool shouldOverrideLegacyDescription(ViewportDescription::Type);
     void setViewportDescription(const ViewportDescription&);
     const ViewportDescription& viewportDescription() const { return m_viewportDescription; }
     Length viewportDefaultMinWidth() const { return m_viewportDefaultMinWidth; }
 
     bool hasLegacyViewportTag() const { return m_legacyViewportDescription.isLegacyViewportType(); }
 
-    void setReferrerPolicy(ReferrerPolicy);
-    ReferrerPolicy referrerPolicy() const { return m_referrerPolicy; }
+    void setReferrerPolicy(ReferrerPolicy) override;
 
     String outgoingReferrer();
     String outgoingOrigin() const;
 
     void setDoctype(PassRefPtrWillBeRawPtr<DocumentType>);
     DocumentType* doctype() const { return m_docType.get(); }
 
     DOMImplementation& implementation();
 
     Element* documentElement() const
@@ skipping 1164 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif // Document_h