Provide a CSSParserContext to CSSSyntaxDescriptor

third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp

Index: third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp b/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
index a7d9ba72a785934c3a13cf5c5b01c15256257b6a..bf5c256706d9dab7b8d9d695a38abfe773665251 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
@@ -89,7 +89,7 @@ MutableStylePropertySet::SetResult CSSParserImpl::parseVariableValue(
       // TODO(timloh): This is a bit wasteful, we parse the registered property
       // to validate but throw away the result.
       if (registration &&
-          !registration->syntax().parse(tokenizer.tokenRange(),
+          !registration->syntax().parse(tokenizer.tokenRange(), context,
                                         isAnimationTainted)) {
         return MutableStylePropertySet::SetResult{didParse, didChange};
       }