[WIP] do something :-)

Source/core/dom/ElementRareData.cpp

Index: Source/core/dom/ElementRareData.cpp
diff --git a/Source/core/dom/ElementRareData.cpp b/Source/core/dom/ElementRareData.cpp
index 08934494c16d767e836bef33f315ebc46ac14930..333e6279d0ce11a9146dd5e9b7b80083f499f339 100644
--- a/Source/core/dom/ElementRareData.cpp
+++ b/Source/core/dom/ElementRareData.cpp
@@ -32,15 +32,11 @@
 #include "core/dom/ElementRareData.h"
 
 #include "core/style/ComputedStyle.h"
+#include "wtf/SizeAssertions.h"
 
 namespace blink {
 
-struct SameSizeAsElementRareData : NodeRareData {
-    short indices[2];
-    LayoutSize sizeForResizing;
-    IntSize scrollOffset;
-    void* pointers[13];
-};
+ASSERT_SIZE(ElementRareData, 88, 152);
 
 CSSStyleDeclaration& ElementRareData::ensureInlineCSSStyleDeclaration(Element* ownerElement)
 {
@@ -75,6 +71,4 @@ DEFINE_TRACE_AFTER_DISPATCH(ElementRareData)
     NodeRareData::traceAfterDispatch(visitor);
 }
 
-static_assert(sizeof(ElementRareData) == sizeof(SameSizeAsElementRareData), "ElementRareData should stay small");
-
 } // namespace blink