Make __qems a CSSPrimitiveValue unit type

Source/core/css/parser/CSSParserValues.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 107 matching lines @@
             value.unit = CSSPrimitiveValue::CSS_IDENT;
             value.string = token.value();
             break;
         }
         case DimensionToken:
             if (!std::isfinite(token.numericValue())) {
                 destroyAndClear();
                 return;
             }
             if (!token.unitType()) {
-                if (String(token.value()) == "__qem") {
-                    value.setFromNumber(token.numericValue(), CSSParserValue::Q_EMS);
-                    value.isInt = (token.numericValueType() == IntegerValueType);
-                    break;
-                }
-
                 // Unknown dimensions are handled as a list of two values
                 value.unit = CSSParserValue::DimensionList;
                 CSSParserValueList* list = new CSSParserValueList;
                 value.valueList = list;
                 value.id = CSSValueInvalid;
 
                 CSSParserValue number;
                 number.setFromNumber(token.numericValue());
                 number.isInt = (token.numericValueType() == IntegerValueType);
                 list->addValue(number);
@@ skipping 213 matching lines @@
 bool CSSParserSelector::hasHostPseudoSelector() const
 {
     for (CSSParserSelector* selector = const_cast<CSSParserSelector*>(this); selector; selector = selector->tagHistory()) {
         if (selector->pseudoType() == CSSSelector::PseudoHost || selector->pseudoType() == CSSSelector::PseudoHostContext)
             return true;
     }
     return false;
 }
 
 } // namespace blink