Make custom elements work in HTML imports

third_party/WebKit/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 994 matching lines @@
     bool isTemplateDocument() const { return !!m_templateDocumentHost; }
     Document& ensureTemplateDocument();
     Document* templateDocumentHost() { return m_templateDocumentHost; }
 
     // TODO(thestig): Rename these and related functions, since we can call them
     // for controls outside of forms as well.
     void didAssociateFormControl(Element*);
 
     void addConsoleMessage(ConsoleMessage*) final;
 
-    LocalDOMWindow* executingWindow() final;
+    LocalDOMWindow* executingWindow() const final;
     LocalFrame* executingFrame();
 
     DocumentLifecycle& lifecycle() { return m_lifecycle; }
     bool isActive() const { return m_lifecycle.isActive(); }
     bool isDetached() const { return m_lifecycle.state() >= DocumentLifecycle::Stopping; }
     bool isStopped() const { return m_lifecycle.state() == DocumentLifecycle::Stopped; }
 
     enum HttpRefreshType {
         HttpRefreshFromHeader,
         HttpRefreshFromMetaTag
@@ skipping 433 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