Revert of Revert of Split out CSSParser public API

Source/core/css/StylePropertySet.cpp

Index: Source/core/css/StylePropertySet.cpp
diff --git a/Source/core/css/StylePropertySet.cpp b/Source/core/css/StylePropertySet.cpp
index 95a21b76e904a07b84b22ee51daba381b6cd6ed3..8ed3545994617ca0355ad0a55703e5472d64d7a2 100644
--- a/Source/core/css/StylePropertySet.cpp
+++ b/Source/core/css/StylePropertySet.cpp
@@ -28,7 +28,7 @@
 #include "core/css/CSSValuePool.h"
 #include "core/css/StylePropertySerializer.h"
 #include "core/css/StyleSheetContents.h"
-#include "core/css/parser/BisonCSSParser.h"
+#include "core/css/parser/CSSParser.h"
 #include "core/frame/UseCounter.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "wtf/text/StringBuilder.h"
@@ -265,7 +265,7 @@
 
     // When replacing an existing property value, this moves the property to the end of the list.
     // Firefox preserves the position, and MSIE moves the property to the beginning.
-    return BisonCSSParser::parseValue(this, propertyID, value, important, cssParserMode(), contextStyleSheet);
+    return CSSParser::parseValue(this, propertyID, value, important, cssParserMode(), contextStyleSheet);
 }
 
 void MutableStylePropertySet::setProperty(CSSPropertyID propertyID, PassRefPtrWillBeRawPtr<CSSValue> prpValue, bool important)
@@ -341,7 +341,7 @@
         context.setMode(cssParserMode());
     }
 
-    BisonCSSParser parser(context);
+    CSSParser parser(context);
     parser.parseDeclaration(this, styleDeclaration, 0, contextStyleSheet);
 }