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

third_party/WebKit/Source/core/css/cssom/CSSUnparsedValue.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/cssom/CSSUnparsedValue.h"
 
 #include "core/css/cssom/CSSStyleVariableReferenceValue.h"
 #include "core/css/parser/CSSTokenizer.h"
 #include "platform/wtf/text/StringBuilder.h"
 
@@ skipping 69 matching lines @@
     if (fragments_[i].isString()) {
       tokens.Append(fragments_[i].getAsString());
     } else if (fragments_[i].isCSSVariableReferenceValue()) {
       tokens.Append(fragments_[i].getAsCSSVariableReferenceValue()->variable());
     } else {
       NOTREACHED();
     }
   }
 
   CSSTokenizer tokenizer(tokens.ToString());
-  return CSSVariableReferenceValue::Create(CSSVariableData::Create(
-      tokenizer.TokenRange(), false /* isAnimationTainted */,
-      true /* needsVariableResolution */));
+  // TODO(alancutter): This should be using a real parser context instead of
+  // StrictCSSParserContext.
+  return CSSVariableReferenceValue::Create(
+      CSSVariableData::Create(tokenizer.TokenRange(),
+                              false /* isAnimationTainted */,
+                              true /* needsVariableResolution */),
+      *StrictCSSParserContext());
 }
 
 }  // namespace blink