Have DOMPatchSupport and DocumentFragment deal with Document references

Source/core/platform/Pasteboard.cpp

 /*
  * Copyright (c) 2008, 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 155 matching lines @@
 {
     chosePlainText = false;
     WebKit::WebClipboard::Buffer buffer = m_selectionMode ? WebKit::WebClipboard::BufferSelection : WebKit::WebClipboard::BufferStandard;
 
     if (WebKit::Platform::current()->clipboard()->isFormatAvailable(WebKit::WebClipboard::FormatHTML, buffer)) {
         unsigned fragmentStart = 0;
         unsigned fragmentEnd = 0;
         WebKit::WebURL url;
         WebKit::WebString markup = WebKit::Platform::current()->clipboard()->readHTML(buffer, &url, &fragmentStart, &fragmentEnd);
         if (!markup.isEmpty()) {
-            if (RefPtr<DocumentFragment> fragment = createFragmentFromMarkupWithContext(frame->document(), markup, fragmentStart, fragmentEnd, KURL(url), DisallowScriptingAndPluginContent))
+            ASSERT(frame->document());
+            if (RefPtr<DocumentFragment> fragment = createFragmentFromMarkupWithContext(*frame->document(), markup, fragmentStart, fragmentEnd, KURL(url), DisallowScriptingAndPluginContent))
                 return fragment.release();
         }
     }
 
     if (allowPlainText) {
         String markup = WebKit::Platform::current()->clipboard()->readPlainText(buffer);
         if (!markup.isEmpty()) {
             chosePlainText = true;
             if (RefPtr<DocumentFragment> fragment = createFragmentFromText(context.get(), markup))
                 return fragment.release();
         }
     }
 
     return 0;
 }
 
 } // namespace WebCore