Ensure original parser context is used when parsing resolved var() references

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/css/CSSSyntaxDescriptor.h"
 
 #include "core/animation/CSSColorInterpolationType.h"
 #include "core/animation/CSSLengthInterpolationType.h"
 #include "core/animation/CSSValueInterpolationType.h"
 #include "core/css/CSSCustomPropertyDeclaration.h"
@@ skipping 185 matching lines @@
   if (!range.AtEnd())
     return nullptr;
   return result;
 }
 
 const CSSValue* CSSSyntaxDescriptor::Parse(CSSParserTokenRange range,
                                            const CSSParserContext* context,
                                            bool is_animation_tainted) const {
   if (IsTokenStream()) {
     return CSSVariableParser::ParseRegisteredPropertyValue(
-        range, false, is_animation_tainted);
+        range, *context, false, is_animation_tainted);
   }
   range.ConsumeWhitespace();
   for (const CSSSyntaxComponent& component : syntax_components_) {
     if (const CSSValue* result =
             ConsumeSyntaxComponent(component, range, context))
       return result;
   }
-  return CSSVariableParser::ParseRegisteredPropertyValue(range, true,
+  return CSSVariableParser::ParseRegisteredPropertyValue(range, *context, true,
                                                          is_animation_tainted);
 }
 
 }  // namespace blink