Update the size expectation of sizeof(CSSValue)

Source/core/css/CSSValue.cpp

 /*
  * Copyright (C) 2011 Andreas Kling (kling@webkit.org)
  *
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 40 matching lines @@
 #include "core/css/CSSReflectValue.h"
 #include "core/css/CSSSVGDocumentValue.h"
 #include "core/css/CSSShadowValue.h"
 #include "core/css/CSSTimingFunctionValue.h"
 #include "core/css/CSSTransformValue.h"
 #include "core/css/CSSUnicodeRangeValue.h"
 #include "core/css/CSSValueList.h"
 
 namespace blink {
 
-struct SameSizeAsCSSValue : public RefCountedWillBeGarbageCollectedFinalized<SameSizeAsCSSValue>, public ScriptWrappableBase {
+struct SameSizeAsCSSValue : public RefCountedWillBeGarbageCollectedFinalized<SameSizeAsCSSValue>
+// FIXME: Figure out why only win builds with oilpan increase sizeof(CSSValue).
+// Deriving ScriptWrappableBase should not increase sizeof(CSSValue).
+#if ENABLE(OILPAN) && OS(WIN)
+    , public ScriptWrappableBase
+#endif
+{
     uint32_t bitfields;
 };
 
 COMPILE_ASSERT(sizeof(CSSValue) <= sizeof(SameSizeAsCSSValue), CSS_value_should_stay_small);
 
 class TextCloneCSSValue : public CSSValue {
 public:
     static PassRefPtrWillBeRawPtr<TextCloneCSSValue> create(ClassType classType, const String& text)
     {
         return adoptRefWillBeNoop(new TextCloneCSSValue(classType, text));
@@ skipping 543 matching lines @@
         return toCSSTransformValue(this)->cloneForCSSOM();
     case ImageSetClass:
         return toCSSImageSetValue(this)->cloneForCSSOM();
     default:
         ASSERT(!isSubtypeExposedToCSSOM());
         return TextCloneCSSValue::create(classType(), cssText());
     }
 }
 
 }