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

Source/core/css/MediaQueryEvaluator.h

 /*
  * CSS Media Query Evaluator
  *
  * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 10 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 MediaQueryEvaluator_h
 #define MediaQueryEvaluator_h
 
+#include "heap/Handle.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 class LocalFrame;
 class MediaQueryExp;
 class MediaQueryResult;
 class MediaQuerySet;
 class RenderStyle;
 
-typedef Vector<RefPtr<MediaQueryResult> > MediaQueryResultList;
+typedef WillBePersistentHeapVector<RefPtrWillBeMember<MediaQueryResult> > MediaQueryResultList;

[zerny-chromium, 2014/03/05 06:38:40]

Maybe this should be expanded at the use sites. It is a bit odd to have the
conditional persistent behind a typedef.

[wibling-chromium, 2014/03/05 08:09:42]

Agree. I will fix this is a subsequent change to not mess up the current commit.

 
 /**
  * Class that evaluates css media queries as defined in
  * CSS3 Module "Media Queries" (http://www.w3.org/TR/css3-mediaqueries/)
  * Special constructors are needed, if simple media queries are to be
  * evaluated without knowledge of the medium features. This can happen
  * for example when parsing UA stylesheets, if evaluation is done
  * right after parsing.
  *
  * the boolean parameter is used to approximate results of evaluation, if
@@ skipping 32 matching lines @@
 
 private:
     AtomicString m_mediaType;
     LocalFrame* m_frame; // Not owned.
     RefPtr<RenderStyle> m_style;
     bool m_expResult;
 };
 
 } // namespace
 #endif