[WIP] do something :-)

Source/core/css/RuleSet.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 23 matching lines @@
 #include "core/css/CSSSelector.h"
 #include "core/css/CSSSelectorList.h"
 #include "core/css/SelectorFilter.h"
 #include "core/css/StyleRuleImport.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/html/track/TextTrackCue.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/TraceEvent.h"
 #include "platform/heap/HeapTerminatedArrayBuilder.h"
 #include "platform/weborigin/SecurityOrigin.h"
-
+#include "wtf/SizeAssertions.h"
 #include "wtf/TerminatedArrayBuilder.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
+ASSERT_SIZE(RuleData, 28, 32);
+
 // -----------------------------------------------------------------
 
 static inline bool selectorListContainsUncommonAttributeSelector(const CSSSelector* selector)
 {
     const CSSSelectorList* selectorList = selector->selectorList();
     if (!selectorList)
         return false;
     for (const CSSSelector* selector = selectorList->first(); selector; selector = CSSSelectorList::next(*selector)) {
         for (const CSSSelector* component = selector; component; component = component->tagHistory()) {
             if (component->isAttributeSelector())
@@ skipping 333 matching lines @@
 
 #ifndef NDEBUG
 void RuleSet::show()
 {
     for (const auto& rule: m_allRules)
         rule.selector().show();
 }
 #endif
 
 } // namespace blink