Add a WebDocument::watchCssSelectors(selectors)

Source/core/rendering/style/StyleRareNonInheritedData.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 19 matching lines @@
 #include "core/rendering/style/CounterDirectives.h"
 #include "core/rendering/style/CursorData.h"
 #include "core/rendering/style/DataRef.h"
 #include "core/rendering/style/FillLayer.h"
 #include "core/rendering/style/LineClampValue.h"
 #include "core/rendering/style/NinePieceImage.h"
 #include "core/rendering/style/ShapeValue.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/Vector.h"
+#include "wtf/WeakPtr.h"
 
 namespace WebCore {
 
 class CSSAnimationDataList;
+class Document;
 class ShadowData;
 class StyleDeprecatedFlexibleBoxData;
 class StyleFilterData;
 class StyleFlexibleBoxData;
 class StyleGridData;
 class StyleGridItemData;
 class StyleMarqueeData;
 class StyleMultiColData;
 class StyleReflection;
 class StyleResolver;
@@ skipping 82 matching lines @@
     Color m_visitedLinkTextDecorationColor;
     Color m_visitedLinkBackgroundColor;
     Color m_visitedLinkOutlineColor;
     Color m_visitedLinkBorderLeftColor;
     Color m_visitedLinkBorderRightColor;
     Color m_visitedLinkBorderTopColor;
     Color m_visitedLinkBorderBottomColor;
 
     int m_order;
 
+#if ENABLE(CSS_CALLBACKS)
+    Vector<String> m_callbackSelectors;
+    WeakPtr<Document> m_document;

[esprehn, 2013/07/13 01:43:01]

This doesn't look right, why do you have a document pointer down here? Also
StyleRareNonInheritedData is huge, an extension could easily end up adding it to
every style this way. ex. doing "div" to show up on every page.

Why do you need the m_document ptr here? All RenderStyle objects are tied to a
specific document anyway and so is the SelectorChecker and the StyleResolver. I
don't think you need those document checks

+#endif
+
     AtomicString m_flowThread;
     AtomicString m_regionThread;
     unsigned m_regionFragment : 1; // RegionFragment
 
     unsigned m_regionBreakAfter : 2; // EPageBreak
     unsigned m_regionBreakBefore : 2; // EPageBreak
     unsigned m_regionBreakInside : 2; // EPageBreak
 
     unsigned m_pageSizeType : 2; // PageSizeType
     unsigned m_transformStyle3D : 1; // ETransformStyle3D
@@ skipping 25 matching lines @@
     unsigned m_touchAction : 1; // TouchAction
 
 private:
     StyleRareNonInheritedData();
     StyleRareNonInheritedData(const StyleRareNonInheritedData&);
 };
 
 } // namespace WebCore
 
 #endif // StyleRareNonInheritedData_h