getComputedStyle() should return used value for 'line-height'

third_party/WebKit/Source/core/style/ComputedStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Adobe Systems Incorporated. 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 1333 matching lines @@
     // too, though this involves messily poking into CalcExpressionLength.
     float multiplier = textAutosizingMultiplier();
     if (multiplier > 1 && lh.isFixed())
         return Length(TextAutosizer::computeAutosizedFontSize(lh.value(), multiplier), Fixed);
 
     return lh;
 }
 
 void ComputedStyle::setLineHeight(const Length& specifiedLineHeight) { SET_VAR(inherited, line_height, specifiedLineHeight); }
 
+float ComputedStyle::floatComputedLineHeight() const
+{
+    const Length& lh = lineHeight();
+
+    // Negative value means the line height is not set. Use the font's built-in
+    // spacing, if avalible.
+    if (lh.isNegative() && font().primaryFont())
+        return getFontMetrics().lineSpacing();
+
+    if (lh.hasPercent())
+        return minimumValueForLength(lh, LayoutUnit(computedFontSize()));
+
+    return std::min(lh.value(), LayoutUnit::max().toFloat());
+}
+
 int ComputedStyle::computedLineHeight() const
 {
     const Length& lh = lineHeight();
 
     // Negative value means the line height is not set. Use the font's built-in
     // spacing, if avalible.
     if (lh.isNegative() && font().primaryFont())
         return getFontMetrics().lineSpacing();
 
     if (lh.hasPercent())
@@ skipping 488 matching lines @@
     if (!shadowList)
         return false;
     for (size_t i = shadowList->shadows().size(); i--; ) {
         if (shadowList->shadows()[i].color().isCurrentColor())
             return true;
     }
     return false;
 }
 
 } // namespace blink