Provide a CSSParserContext to CSSSyntaxDescriptor

third_party/WebKit/Source/core/css/CSSSyntaxDescriptor.h

Index: third_party/WebKit/Source/core/css/CSSSyntaxDescriptor.h
diff --git a/third_party/WebKit/Source/core/css/CSSSyntaxDescriptor.h b/third_party/WebKit/Source/core/css/CSSSyntaxDescriptor.h
index 63e9e14d5a5ae6dd8e9cbd121e5cf2a958594c92..0ff8908a051b02ba183148ca3776f1171e45e062 100644
--- a/third_party/WebKit/Source/core/css/CSSSyntaxDescriptor.h
+++ b/third_party/WebKit/Source/core/css/CSSSyntaxDescriptor.h
@@ -9,6 +9,7 @@
 
 namespace blink {
 
+class CSSParserContext;
 class CSSValue;
 
 enum class CSSSyntaxType {
@@ -42,7 +43,9 @@ class CSSSyntaxDescriptor {
  public:
   CSSSyntaxDescriptor(String syntax);
 
-  const CSSValue* parse(CSSParserTokenRange, bool isAnimationTainted) const;
+  const CSSValue* parse(CSSParserTokenRange,
+                        const CSSParserContext*,
+                        bool isAnimationTainted) const;
   bool isValid() const { return !m_syntaxComponents.isEmpty(); }
   bool isTokenStream() const {
     return m_syntaxComponents.size() == 1 &&