Web Animations API: Implement step-middle and steps(x, middle) timing functions.

Source/core/css/parser/BisonCSSParser.h

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 - 2010  Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 70 matching lines @@
 
 public:
     BisonCSSParser(const CSSParserContext&, UseCounter* = 0);
 
     ~BisonCSSParser();
 
     void parseSheet(StyleSheetContents*, const String&, const TextPosition& startPosition = TextPosition::minimumPosition(), CSSParserObserver* = 0, bool = false);
     PassRefPtr<StyleRuleBase> parseRule(StyleSheetContents*, const String&);
     PassRefPtr<StyleKeyframe> parseKeyframeRule(StyleSheetContents*, const String&);
     bool parseSupportsCondition(const String&);
-    static bool parseValue(MutableStylePropertySet*, CSSPropertyID, const String&, bool important, CSSParserMode, StyleSheetContents*);
+    static bool parseValue(MutableStylePropertySet*, CSSPropertyID, const String&, bool important, CSSParserMode, StyleSheetContents*, bool parseStepMiddleTimingFunction = false);
     static bool parseColor(RGBA32& color, const String&, bool strict = false);
     static bool parseSystemColor(RGBA32& color, const String&, Document*);
     static PassRefPtr<CSSValueList> parseFontFaceValue(const AtomicString&);
-    static PassRefPtr<CSSValue> parseAnimationTimingFunctionValue(const String&);
+    static PassRefPtr<CSSValue> parseAnimationTimingFunctionValue(const String&, bool parseStepMiddleTimingFunction = false);
     PassRefPtr<CSSPrimitiveValue> parseValidPrimitive(CSSValueID ident, CSSParserValue*);
     bool parseDeclaration(MutableStylePropertySet*, const String&, CSSParserObserver*, StyleSheetContents* contextStyleSheet);
     static PassRefPtr<ImmutableStylePropertySet> parseInlineStyleDeclaration(const String&, Element*);
     PassRefPtr<MediaQuerySet> parseMediaQueryList(const String&);
     PassOwnPtr<Vector<double> > parseKeyframeKeyList(const String&);
 
     void addPropertyWithPrefixingVariant(CSSPropertyID, PassRefPtr<CSSValue>, bool important, bool implicit = false);
     void addProperty(CSSPropertyID, PassRefPtr<CSSValue>, bool important, bool implicit = false);
     void rollbackLastProperties(int num);
     bool hasProperties() const { return !m_parsedProperties.isEmpty(); }
@@ skipping 270 matching lines @@
     unsigned m_numParsedPropertiesBeforeMarginBox;
 
     int m_inParseShorthand;
     CSSPropertyID m_currentShorthand;
     bool m_implicitShorthand;
 
     bool m_hasFontFaceOnlyValues;
     bool m_hadSyntacticallyValidCSSRule;
     bool m_logErrors;
     bool m_ignoreErrors;
+    bool m_parseStepMiddleTimingFunction;
 
     AtomicString m_defaultNamespace;
 
     // tokenizer methods and data
     CSSParserObserver* m_observer;
 
     // Local functions which just call into CSSParserObserver if non-null.
     void startRule();
     void endRule(bool valid);
     void startRuleHeader(CSSRuleSourceData::Type);
@@ skipping 233 matching lines @@
 bool isValidNthToken(const CSSParserString&);
 
 inline int cssyylex(void* yylval, BisonCSSParser* parser)
 {
     return parser->m_tokenizer.lex(yylval);
 }
 
 } // namespace WebCore
 
 #endif // CSSParser_h