Change various helper classes to transition types to get CSSValue entirely onto the gc heap.

Source/core/css/MediaQuery.h

 /*
  * CSS Media Query
  *
  * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 11 matching lines @@
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef MediaQuery_h
 #define MediaQuery_h
 
+#include "heap/Handle.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/Vector.h"
 #include "wtf/text/StringHash.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 class MediaQueryExp;
 
-typedef Vector<OwnPtr<MediaQueryExp> > ExpressionVector;
+typedef WillBeHeapVector<OwnPtrWillBeMember<MediaQueryExp> > ExpressionVector;

[haraken, 2014/03/03 10:51:30]

Probably you might want to use "ExpressionHeapVector" to make the underlying
data structure clear.

[wibling-chromium, 2014/03/03 11:21:11]

Done.

 
-class MediaQuery {
-    WTF_MAKE_FAST_ALLOCATED;
+class MediaQuery : public NoBaseWillBeGarbageCollectedFinalized<MediaQuery> {
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
     enum Restrictor {
         Only, Not, None
     };
 
-    MediaQuery(Restrictor, const AtomicString& mediaType, PassOwnPtr<ExpressionVector> exprs);
+    MediaQuery(Restrictor, const AtomicString& mediaType, PassOwnPtrWillBeRawPtr<ExpressionVector> exprs);
     ~MediaQuery();
 
     Restrictor restrictor() const { return m_restrictor; }
     const ExpressionVector& expressions() const { return *m_expressions; }
     const AtomicString& mediaType() const { return m_mediaType; }
     bool operator==(const MediaQuery& other) const;
     String cssText() const;
 
-    PassOwnPtr<MediaQuery> copy() const { return adoptPtr(new MediaQuery(*this)); }
+    PassOwnPtrWillBeRawPtr<MediaQuery> copy() const { return adoptPtrWillBeNoop(new MediaQuery(*this)); }
+
+    void trace(Visitor*);
 
 private:
     MediaQuery(const MediaQuery&);
 
     Restrictor m_restrictor;
     AtomicString m_mediaType;
-    OwnPtr<ExpressionVector> m_expressions;
+    OwnPtrWillBeMember<ExpressionVector> m_expressions;
     String m_serializationCache;
 
     String serialize() const;
 };
 
 } // namespace
 
 #endif