A thread-safe Media Query Parser

Source/core/css/MediaQuery.cpp

Index: Source/core/css/MediaQuery.cpp
diff --git a/Source/core/css/MediaQuery.cpp b/Source/core/css/MediaQuery.cpp
index 54067aff931c1a0151fd78cb2516373a5d2e56b7..42a78849defa2c1a53f74a0f3418678f628bc64c 100644
--- a/Source/core/css/MediaQuery.cpp
+++ b/Source/core/css/MediaQuery.cpp
@@ -75,6 +75,11 @@ static bool expressionCompare(const OwnPtrWillBeMember<MediaQueryExp>& a, const
     return codePointCompare(a->serialize(), b->serialize()) < 0;
 }
 
+PassOwnPtrWillBeRawPtr<MediaQuery> MediaQuery::createNotAll()
+{
+    return adoptPtrWillBeNoop(new MediaQuery(MediaQuery::Not, "all", nullptr));
+}
+
 MediaQuery::MediaQuery(Restrictor r, const String& mediaType, PassOwnPtrWillBeRawPtr<ExpressionHeapVector> expressions)
     : m_restrictor(r)
     , m_mediaType(attemptStaticStringCreation(mediaType.lower()))