Fixing inconsistency with Media Query append/deleteMedium.

Source/core/css/StyleMedia.cpp

Index: Source/core/css/StyleMedia.cpp
diff --git a/Source/core/css/StyleMedia.cpp b/Source/core/css/StyleMedia.cpp
index f425c87d13a5f21c8c2966701d8199c2ad2b15cd..6f003f7574bf0a8400b230aa66f2d650fb461049 100644
--- a/Source/core/css/StyleMedia.cpp
+++ b/Source/core/css/StyleMedia.cpp
@@ -67,7 +67,7 @@ bool StyleMedia::matchMedium(const String& query) const
     RefPtr<RenderStyle> rootStyle = styleResolver->styleForElement(documentElement, 0 /*defaultParent*/, DisallowStyleSharing, MatchOnlyUserAgentRules);
 
     RefPtr<MediaQuerySet> media = MediaQuerySet::create();
-    if (!media->parse(query))
+    if (!media->set(query))
         return false;
 
     MediaQueryEvaluator screenEval(type(), m_frame, rootStyle.get());