Added null safety to CSSParserContext args in CSSPropertyOffsetPathUtils

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

Index: third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
index 5270cc2c2a50d856c43cacdf37550e50cda6fed6..8849a631ac08931258858c55dd55b4af94805c98 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
@@ -723,8 +723,9 @@ static CSSValue* ConsumeOffsetRotate(CSSParserTokenRange& range,
 
 // offset: <offset-path> <offset-distance> <offset-rotate>
 bool CSSPropertyParser::ConsumeOffsetShorthand(bool important) {
+  DCHECK(context_);
   const CSSValue* offset_path =
-      CSSPropertyOffsetPathUtils::ConsumeOffsetPath(range_, context_);
+      CSSPropertyOffsetPathUtils::ConsumeOffsetPath(range_, *context_);
   const CSSValue* offset_distance =
       ConsumeLengthOrPercent(range_, context_->Mode(), kValueRangeAll);
   const CSSValue* offset_rotate = ConsumeOffsetRotate(range_, *context_);