Avoid use of CSSValue in MediaQueryExp and MediaQueryEvaluator

Source/core/css/CSSPrimitiveValue.h

Index: Source/core/css/CSSPrimitiveValue.h
diff --git a/Source/core/css/CSSPrimitiveValue.h b/Source/core/css/CSSPrimitiveValue.h
index 6e62b4f2c1f3c069186077fa562883522f82c993..79c6e91a1cbf9c9a84e2e805b132cfd96bdca149 100644
--- a/Source/core/css/CSSPrimitiveValue.h
+++ b/Source/core/css/CSSPrimitiveValue.h
@@ -176,7 +176,6 @@ public:
     };
     static UnitCategory unitCategory(CSSPrimitiveValue::UnitTypes);
 
-    typedef HashMap<String, CSSPrimitiveValue::UnitTypes> UnitTable;
     static UnitTypes fromName(const String& unit);
 
     bool isAngle() const
@@ -214,14 +213,10 @@ public:
     bool isCalculated() const { return m_primitiveUnitType == CSS_CALC; }
     bool isCalculatedPercentageWithNumber() const { return primitiveType() == CSS_CALC_PERCENTAGE_WITH_NUMBER; }
     bool isCalculatedPercentageWithLength() const { return primitiveType() == CSS_CALC_PERCENTAGE_WITH_LENGTH; }
-    bool isDotsPerInch() const { return primitiveType() == CSS_DPI; }
-    bool isDotsPerPixel() const { return primitiveType() == CSS_DPPX; }
-    bool isDotsPerCentimeter() const { return primitiveType() == CSS_DPCM; }
-    bool isResolution() const
-    {
-        unsigned short type = primitiveType();
-        return type >= CSS_DPPX && type <= CSS_DPCM;
-    }
+    static bool isDotsPerInch(UnitTypes type) { return type == CSS_DPI; }
+    static bool isDotsPerPixel(UnitTypes type) { return type == CSS_DPPX; }
+    static bool isDotsPerCentimeter(UnitTypes type) { return type == CSS_DPCM; }
+    static bool isResolution(UnitTypes type) { return type >= CSS_DPPX && type <= CSS_DPCM; }
     bool isFlex() const { return primitiveType() == CSS_FR; }
     bool isValueID() const { return m_primitiveUnitType == CSS_VALUE_ID; }
     bool colorIsDerivedFromElement() const;
@@ -356,6 +351,7 @@ public:
 
     template<typename T> inline operator T() const; // Defined in CSSPrimitiveValueMappings.h
 
+    static const char* unitTypeToString(UnitTypes);
     String customCSSText(CSSTextFormattingFlags = QuoteCSSStringIfNeeded) const;
 
     bool isQuirkValue() { return m_isQuirkValue; }