Add LayoutRoot

sky/engine/core/rendering/RenderBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 419 matching lines @@
 }
 
 bool RenderBlock::hasCaret() const
 {
     return hasCursorCaret(frame()->selection(), this)
         || hasDragCaret(frame()->page()->dragCaretController(), this);
 }
 
 void RenderBlock::paintCarets(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
+    if (!frame())
+        return;
     FrameSelection& selection = frame()->selection();
     if (hasCursorCaret(selection, this)) {
         selection.paintCaret(paintInfo.context, paintOffset, paintInfo.rect);
     }
 
     DragCaretController& dragCaretController = frame()->page()->dragCaretController();
     if (hasDragCaret(dragCaretController, this)) {
         dragCaretController.paintDragCaret(frame(), paintInfo.context, paintOffset, paintInfo.rect);
     }
 }
@@ skipping 1221 matching lines @@
 void RenderBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const RenderObject* obj) const
 {
     showRenderObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace blink