Remove support for -webkit-line-clamp

Source/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 5475 matching lines @@
         // CSS2.1 states that the baseline of an inline block is the baseline of the last line box in
         // the normal flow.  We make an exception for marquees, since their baselines are meaningless
         // (the content inside them moves).  This matches WinIE as well, which just bottom-aligns them.
         // We also give up on finding a baseline if we have a vertical scrollbar, or if we are scrolled
         // vertically (e.g., an overflow:hidden block that has had scrollTop moved).
         bool ignoreBaseline = (layer() && (isMarquee() || (direction == HorizontalLine ? (layer()->verticalScrollbar() || layer()->scrollYOffset())
             : (layer()->horizontalScrollbar() || layer()->scrollXOffset())))) || (isWritingModeRoot() && !isRubyRun());
 
         int baselinePos = ignoreBaseline ? -1 : inlineBlockBaseline(direction);
 
-        if (isDeprecatedFlexibleBox()) {
-            // Historically, we did this check for all baselines. But we can't
-            // remove this code from deprecated flexbox, because it effectively
-            // breaks -webkit-line-clamp, which is used in the wild -- we would
-            // calculate the baseline as if -webkit-line-clamp wasn't used.
-            // For simplicity, we use this for all uses of deprecated flexbox.
-            LayoutUnit bottomOfContent = direction == HorizontalLine ? borderTop() + paddingTop() + contentHeight() : borderRight() + paddingRight() + contentWidth();
-            if (baselinePos > bottomOfContent)
-                baselinePos = -1;
-        }
         if (baselinePos != -1)
             return direction == HorizontalLine ? marginTop() + baselinePos : marginRight() + baselinePos;
 
         return RenderBox::baselinePosition(baselineType, firstLine, direction, linePositionMode);
     }
 
     // If we're not replaced, we'll only get called with PositionOfInteriorLineBoxes.
     // Note that inline-block counts as replaced here.
     ASSERT(linePositionMode == PositionOfInteriorLineBoxes);
 
@@ skipping 1285 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 WebCore