Rendering text to a canvas in a frame-less document.

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.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 1404 matching lines @@
     return m_frame ? m_frame->page() : nullptr;
 }
 
 FrameHost* Document::frameHost() const
 {
     return m_frame ? m_frame->host() : nullptr;
 }
 
 Settings* Document::settings() const
 {
-    return m_frame ? m_frame->settings() : nullptr;
+    if (m_frame)
+        return m_frame->settings();
+    if (!m_defaultSettings)
+        m_defaultSettings = Settings::create();
+    return m_defaultSettings.get();
 }
 
 Range* Document::createRange()
 {
     return Range::create(*this);
 }
 
 NodeIterator* Document::createNodeIterator(Node* root, unsigned whatToShow, NodeFilter* filter)
 {
     DCHECK(root);
@@ skipping 4653 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