Remove -webkit-line-box-contain implementation.

Source/core/layout/LayoutBlock.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 2213 matching lines @@
 
     const FontMetrics& fontMetrics = style(firstLine)->fontMetrics();
     return fontMetrics.ascent(baselineType) + (lineHeight(firstLine, direction, linePositionMode) - fontMetrics.height()) / 2;
 }
 
 LayoutUnit LayoutBlock::minLineHeightForReplacedObject(bool isFirstLine, LayoutUnit replacedHeight) const
 {
     if (!document().inNoQuirksMode() && replacedHeight)
         return replacedHeight;
 
-    if (!(style(isFirstLine)->lineBoxContain() & LineBoxContainBlock))
-        return LayoutUnit();
-
     return std::max<LayoutUnit>(replacedHeight, lineHeight(isFirstLine, isHorizontalWritingMode() ? HorizontalLine : VerticalLine, PositionOfInteriorLineBoxes));
 }
 
 int LayoutBlock::firstLineBoxBaseline() const
 {
     if (isWritingModeRoot() && !isRubyRun())
         return -1;
 
     if (childrenInline()) {
         if (firstLineBox())
@@ skipping 638 matching lines @@
 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const LayoutObject* obj) const
 {
     showLayoutObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace blink