Oilpan: exempt CSSBasicShapeValue from GC plugin checking.

third_party/WebKit/Source/core/css/CSSBasicShapeValue.h

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * 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 22 matching lines @@
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/CSSValue.h"
 #include "core/css/CSSValuePair.h"
 #include "platform/graphics/GraphicsTypes.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
-class CORE_EXPORT CSSBasicShapeValue : public CSSValue {
+// TODO(Oilpan): the GC plugin is not capable of understanding that
+// the traceAfterDispatch() method covers subtypes of CSSBasicShapeValue.
+// Temporarily exempt it from being checked
+class CORE_EXPORT GC_PLUGIN_IGNORE("535448") CSSBasicShapeValue : public CSSValue {
 public:
     enum Type {
         CSSBasicShapeEllipseType,
         CSSBasicShapePolygonType,
         CSSBasicShapeCircleType,
         CSSBasicShapeInsetType
     };
 
     String customCSSText() const;
 
@@ skipping 182 matching lines @@
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSBasicShapeValue, isBasicShapeValue());
 
 DEFINE_TYPE_CASTS(CSSBasicShapeCircleValue, CSSBasicShapeValue, shape, shape->isCircle(), shape.isCircle());
 DEFINE_TYPE_CASTS(CSSBasicShapeEllipseValue, CSSBasicShapeValue, shape, shape->isEllipse(), shape.isEllipse());
 DEFINE_TYPE_CASTS(CSSBasicShapePolygonValue, CSSBasicShapeValue, shape, shape->isPolygon(), shape.isPolygon());
 DEFINE_TYPE_CASTS(CSSBasicShapeInsetValue, CSSBasicShapeValue, shape, shape->isInset(), shape.isInset());
 
 } // namespace blink
 
 #endif // CSSBasicShapeValue_h