Added null safety for CSSParserContext in CSSPropertyShapeUtils.

third_party/WebKit/Source/core/css/properties/CSSPropertyAPIShapeOutside.cpp

 // Copyright 2017 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/properties/CSSPropertyAPIShapeOutside.h"
 
 #include "core/css/CSSValueList.h"
 #include "core/css/parser/CSSParserContext.h"
 #include "core/css/parser/CSSPropertyParserHelpers.h"
 #include "core/css/properties/CSSPropertyShapeUtils.h"
 
 namespace blink {
 
 using namespace CSSPropertyParserHelpers;
 
 const CSSValue* CSSPropertyAPIShapeOutside::parseSingleValue(
     CSSParserTokenRange& range,
     const CSSParserContext& context,
     CSSPropertyID) {
   if (CSSValue* image_value = ConsumeImageOrNone(range, &context))
     return image_value;
   CSSValueList* list = CSSValueList::CreateSpaceSeparated();
   if (CSSValue* box_value = ConsumeShapeBox(range))
     list->Append(*box_value);
   if (CSSValue* shape_value =
-          CSSPropertyShapeUtils::ConsumeBasicShape(range, &context)) {
+          CSSPropertyShapeUtils::ConsumeBasicShape(range, context)) {
     list->Append(*shape_value);
     if (list->length() < 2) {
       if (CSSValue* box_value = ConsumeShapeBox(range))
         list->Append(*box_value);
     }
   }
   if (!list->length())
     return nullptr;
   return list;
 }
 
 }  // namespace blink