Revert "Do not correct for zoom for number line-height"

Source/core/css/ComputedStyleCSSValueMapping.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ skipping 461 matching lines @@
     ASSERT(result->length() <= 3);
     return result.release();
 }
 
 static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> valueForLineHeight(const ComputedStyle& style)
 {
     Length length = style.lineHeight();
     if (length.isNegative())
         return cssValuePool().createIdentifierValue(CSSValueNormal);
 
-    float floatValue = floatValueForLength(length, style.fontDescription().specifiedSize());
-    if (length.isPercent())
-        return cssValuePool().createValue(floatValue, CSSPrimitiveValue::CSS_PX);
-
-    return zoomAdjustedPixelValue(floatValue, style);
+    return zoomAdjustedPixelValue(floatValueForLength(length, style.fontDescription().specifiedSize()), style);
 }
 
 static CSSValueID identifierForFamily(const AtomicString& family)
 {
     if (family == FontFamilyNames::webkit_cursive)
         return CSSValueCursive;
     if (family == FontFamilyNames::webkit_fantasy)
         return CSSValueFantasy;
     if (family == FontFamilyNames::webkit_monospace)
         return CSSValueMonospace;
@@ skipping 2077 matching lines @@
     case CSSPropertyAll:
         return nullptr;
     default:
         break;
     }
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 }