[WIP] do something :-)

Source/core/style/ComputedStyle.cpp

Index: Source/core/style/ComputedStyle.cpp
diff --git a/Source/core/style/ComputedStyle.cpp b/Source/core/style/ComputedStyle.cpp
index 342cd0056ccd950281007948e88379902baa3259..8c5cc0431ff57c379fa3d594e8aee7b9762618dc 100644
--- a/Source/core/style/ComputedStyle.cpp
+++ b/Source/core/style/ComputedStyle.cpp
@@ -46,33 +46,14 @@
 #include "platform/transforms/ScaleTransformOperation.h"
 #include "platform/transforms/TranslateTransformOperation.h"
 #include "wtf/MathExtras.h"
+#include "wtf/SizeAssertions.h"
 
 #include <algorithm>
 
 namespace blink {
 
-struct SameSizeAsBorderValue {
-    RGBA32 m_color;
-    unsigned m_width;
-};
-
-static_assert(sizeof(BorderValue) == sizeof(SameSizeAsBorderValue), "BorderValue should stay small");
-
-struct SameSizeAsComputedStyle : public RefCounted<SameSizeAsComputedStyle> {
-    void* dataRefs[7];
-    void* ownPtrs[1];
-    void* dataRefSvgStyle;
-
-    struct InheritedFlags {
-        unsigned m_bitfields[2];
-    } inherited_flags;
-
-    struct NonInheritedFlags {
-        unsigned m_bitfields[2];
-    } noninherited_flags;
-};
-
-static_assert(sizeof(ComputedStyle) == sizeof(SameSizeAsComputedStyle), "ComputedStyle should stay small");
+ASSERT_SIZE(BorderValue, 8, 8);
+ASSERT_SIZE(ComputedStyle, 56, 96);
 
 PassRefPtr<ComputedStyle> ComputedStyle::create()
 {