getComputedStyle(e).quotes always return empty string

Source/core/style/QuotesData.h

Index: Source/core/style/QuotesData.h
diff --git a/Source/core/style/QuotesData.h b/Source/core/style/QuotesData.h
index 36f1d6f6400c827084b3d318374f50c706343c34..bd8b499e7bbd817db19060d04a66762b4ca75b5b 100644
--- a/Source/core/style/QuotesData.h
+++ b/Source/core/style/QuotesData.h
@@ -41,6 +41,7 @@ public:
     void addPair(const std::pair<String, String> quotePair);
     const String getOpenQuote(int index) const;
     const String getCloseQuote(int index) const;
+    int size() { return m_quotePairs.size(); }
 
 private:
     QuotesData() { }