Revert of Split out CSSParser public API

Source/core/css/CSSKeyframesRule.cpp

Index: Source/core/css/CSSKeyframesRule.cpp
diff --git a/Source/core/css/CSSKeyframesRule.cpp b/Source/core/css/CSSKeyframesRule.cpp
index 77fc115216f7024003290767120dfc19fd0006f6..8700d81922bafd2a0a6da16d6988c57f56c7fbfd 100644
--- a/Source/core/css/CSSKeyframesRule.cpp
+++ b/Source/core/css/CSSKeyframesRule.cpp
@@ -27,9 +27,9 @@
 #include "core/css/CSSKeyframesRule.h"
 
 #include "core/css/CSSKeyframeRule.h"
+#include "core/css/parser/BisonCSSParser.h"
 #include "core/css/CSSRuleList.h"
 #include "core/css/CSSStyleSheet.h"
-#include "core/css/parser/CSSParser.h"
 #include "core/frame/UseCounter.h"
 #include "wtf/text/StringBuilder.h"
 
@@ -124,7 +124,8 @@
 
     CSSStyleSheet* styleSheet = parentStyleSheet();
     CSSParserContext context(parserContext(), UseCounter::getFrom(styleSheet));
-    RefPtrWillBeRawPtr<StyleKeyframe> keyframe = CSSParser::parseKeyframeRule(context, styleSheet ? styleSheet->contents() : 0, ruleText);
+    BisonCSSParser parser(context);
+    RefPtrWillBeRawPtr<StyleKeyframe> keyframe = parser.parseKeyframeRule(styleSheet ? styleSheet->contents() : 0, ruleText);
     if (!keyframe)
         return;