Revert "A sizes attribute parser" (https://codereview.chromium.org/224733011)

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..aecea7cbee317b78f060db2139f80b46a89ce60c 100644
--- a/Source/core/css/CSSPrimitiveValue.h
+++ b/Source/core/css/CSSPrimitiveValue.h
@@ -196,12 +196,11 @@ public:
             || m_primitiveUnitType == CSS_REMS
             || m_primitiveUnitType == CSS_CHS;
     }
-    static bool isViewportPercentageLength(unsigned short type) { return type >= CSS_VW && type <= CSS_VMAX; }
-    static bool isLength(unsigned short type)
+    bool isLength() const
     {
-        return (type >= CSS_EMS && type <= CSS_PC) || type == CSS_REMS || type == CSS_CHS || isViewportPercentageLength(type);
+        unsigned short type = primitiveType();
+        return (type >= CSS_EMS && type <= CSS_PC) || type == CSS_REMS || type == CSS_CHS || isViewportPercentageLength();
     }
-    bool isLength() const { return isLength(primitiveType()); }
     bool isNumber() const { return primitiveType() == CSS_NUMBER; }
     bool isPercentage() const { return primitiveType() == CSS_PERCENTAGE; }
     bool isPx() const { return primitiveType() == CSS_PX; }
@@ -222,6 +221,7 @@ public:
         unsigned short type = primitiveType();
         return type >= CSS_DPPX && type <= CSS_DPCM;
     }
+    bool isViewportPercentageLength() const { return m_primitiveUnitType >= CSS_VW && m_primitiveUnitType <= CSS_VMAX; }
     bool isFlex() const { return primitiveType() == CSS_FR; }
     bool isValueID() const { return m_primitiveUnitType == CSS_VALUE_ID; }
     bool colorIsDerivedFromElement() const;