Use a JS markup serializer.

sky/engine/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 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
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 WebString WebLocalFrameImpl::contentAsText(size_t maxChars) const
 {
     if (!frame())
         return WebString();
     StringBuilder text;
     frameContentAsPlainText(maxChars, frame(), text);
     return text.toString();
 }
 
-WebString WebLocalFrameImpl::contentAsMarkup() const
-{
-    if (!frame())
-        return WebString();
-    return createMarkup(frame()->document());
-}
-
 WebString WebLocalFrameImpl::renderTreeAsText(RenderAsTextControls toShow) const
 {
     RenderAsTextBehavior behavior = RenderAsTextBehaviorNormal;
 
     if (toShow & RenderAsTextDebug)
         behavior |= RenderAsTextShowCompositedLayers | RenderAsTextShowAddresses | RenderAsTextShowIDAndClass | RenderAsTextShowLayerNesting;
 
     return externalRepresentation(frame(), behavior);
 }
 
@@ skipping 106 matching lines @@
 }
 
 void WebLocalFrameImpl::invalidateAll() const
 {
     ASSERT(frame() && frame()->view());
     FrameView* view = frame()->view();
     view->invalidateRect(view->frameRect());
 }
 
 } // namespace blink