MediaQueryTokenizer does not parse correctly negative exponents

Source/core/css/parser/MediaQueryTokenizer.cpp

Index: Source/core/css/parser/MediaQueryTokenizer.cpp
diff --git a/Source/core/css/parser/MediaQueryTokenizer.cpp b/Source/core/css/parser/MediaQueryTokenizer.cpp
index 828f0495f89b240eec1bc154fb20ca39ba612f5f..b97c6a4ea00b7bd16ae1af9d4dd1760b05e013e7 100644
--- a/Source/core/css/parser/MediaQueryTokenizer.cpp
+++ b/Source/core/css/parser/MediaQueryTokenizer.cpp
@@ -280,7 +280,7 @@ static double getFraction(MediaQueryInputStream& input, unsigned& offset, unsign
     return input.getDouble(fractionStartPos, fractionEndPos);
 }
 
-static unsigned long long getExponent(MediaQueryInputStream& input, unsigned& offset, int sign)
+static unsigned long long getExponent(MediaQueryInputStream& input, unsigned& offset, int& sign)
 {
     unsigned exponentStartPos = 0;
     unsigned exponentEndPos = 0;