Split the CSSParserContext class out of CSSParserMode into its own file.

third_party/WebKit/Source/core/css/parser/CSSParser.h

 // 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.
 
 #ifndef CSSParser_h
 #define CSSParser_h
 
 #include "core/CSSPropertyNames.h"
 #include "core/CoreExport.h"
-#include "core/css/CSSValue.h"
 #include "core/css/StylePropertySet.h"
-#include "core/css/parser/CSSParserMode.h"
-#include "platform/graphics/Color.h"
+#include "core/css/parser/CSSParserContext.h"
 #include <memory>
 
 namespace blink {
 
+class Color;
 class CSSParserObserver;
 class CSSParserTokenRange;
 class CSSSelectorList;
 class Element;
 class ImmutableStylePropertySet;
 class StyleRuleBase;
 class StyleRuleKeyframe;
 class StyleSheetContents;
+class CSSValue;
 
 // This class serves as the public API for the css/parser subsystem
 class CORE_EXPORT CSSParser {
   STATIC_ONLY(CSSParser);
 
  public:
   // As well as regular rules, allows @import and @namespace but not @charset
   static StyleRuleBase* parseRule(const CSSParserContext&,
                                   StyleSheetContents*,
                                   const String&);
@@ skipping 64 matching lines @@
       MutableStylePropertySet*,
       CSSPropertyID unresolvedProperty,
       const String&,
       bool important,
       const CSSParserContext&);
 };
 
 }  // namespace blink
 
 #endif  // CSSParser_h