Introduce the nested namespace ::blink::cssvalue, start with CSSColorValue.

third_party/WebKit/Source/core/css/parser/CSSParserFastPaths.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/css/parser/CSSParserFastPaths.h"
 
 #include "core/StylePropertyShorthand.h"
 #include "core/css/CSSColorValue.h"
 #include "core/css/CSSFunctionValue.h"
 #include "core/css/CSSIdentifierValue.h"
 #include "core/css/CSSInheritedValue.h"
 #include "core/css/CSSInitialValue.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/StyleColor.h"
 #include "core/css/parser/CSSParserIdioms.h"
 #include "core/css/parser/CSSPropertyParser.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "wtf/text/StringToNumber.h"
 
 namespace blink {
 
+using namespace cssvalue;
+
 static inline bool isSimpleLengthPropertyID(CSSPropertyID propertyId,
                                             bool& acceptsNegativeNumbers) {
   switch (propertyId) {
     case CSSPropertyBlockSize:
     case CSSPropertyInlineSize:
     case CSSPropertyMinBlockSize:
     case CSSPropertyMinInlineSize:
     case CSSPropertyFontSize:
     case CSSPropertyGridColumnGap:
     case CSSPropertyGridRowGap:
@@ skipping 1175 matching lines @@
   if (isColorPropertyID(propertyID))
     return parseColor(string, parserMode);
   if (CSSValue* keyword = parseKeywordValue(propertyID, string, parserMode))
     return keyword;
   if (CSSValue* transform = parseSimpleTransform(propertyID, string))
     return transform;
   return nullptr;
 }
 
 }  // namespace blink