Disallow setting invalid values for registered properties via CSSOM

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * 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, 2011, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
@@ skipping 6428 matching lines @@
   return LayoutViewItem(m_layoutView);
 }
 
 PropertyRegistry* Document::propertyRegistry() {
   // TODO(timloh): When the flag is removed, return a reference instead.
   if (!m_propertyRegistry && RuntimeEnabledFeatures::cssVariables2Enabled())
     m_propertyRegistry = PropertyRegistry::create();
   return m_propertyRegistry;
 }
 
+const PropertyRegistry* Document::propertyRegistry() const {
+  return const_cast<Document*>(this)->propertyRegistry();
+}
+
 void Document::incrementPasswordCount() {
   ++m_passwordCount;
   if (isSecureContext() || m_passwordCount != 1) {
     // The browser process only cares about passwords on pages where the
     // top-level URL is not secure. Secure contexts must have a top-level
     // URL that is secure, so there is no need to send notifications for
     // password fields in secure contexts.
     //
     // Also, only send a message on the first visible password field; the
     // browser process doesn't care about the presence of additional
@@ skipping 122 matching lines @@
 }
 
 void showLiveDocumentInstances() {
   WeakDocumentSet& set = liveDocumentSet();
   fprintf(stderr, "There are %u documents currently alive:\n", set.size());
   for (Document* document : set)
     fprintf(stderr, "- Document %p URL: %s\n", document,
             document->url().getString().utf8().data());
 }
 #endif