Use unified invalidation path for repaint-only style changes

Source/core/rendering/RenderObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 847 matching lines @@
 
     // Invalidate the paint of a specific subrectangle within a given object. The rect |r| is in the object's coordinate space.
     void invalidatePaintRectangle(const LayoutRect&) const;
 
     bool invalidatePaintIfNeeded(const RenderLayerModelObject& paintInvalidationContainer,
         const LayoutRect& oldBounds, const LayoutPoint& oldPositionFromPaintInvalidationContainer, const PaintInvalidationState&);
 
     // Walk the tree after layout issuing paint invalidations for renderers that have changed or moved, updating bounds that have changed, and clearing paint invalidation state.
     virtual void invalidateTreeIfNeeded(const PaintInvalidationState&);
 
+    // For now RenderBoxes and RenderSVGModelObjects know how to invalidate themselves in invalidateTreeIfNeeded.
+    // Other objects (e.g. RenderText, RenderInline, etc) depend on their containers for invalidation.
+    // crbug.com/394133.
+    bool canSelfInvalidateDuringTreeInvalidation() const { return isBox() || isSVG(); }
+
     virtual void invalidatePaintForOverflow();
     void invalidatePaintForOverflowIfNeeded();
 
     bool checkForPaintInvalidation() const;
 
     // Returns the rect that should have paint invalidated whenever this object changes. The rect is in the view's
     // coordinate space. This method deals with outlines and overflow.
     LayoutRect absoluteClippedOverflowRect() const
     {
         return clippedOverflowRectForPaintInvalidation(0);
@@ skipping 656 matching lines @@
 void showTree(const blink::RenderObject*);
 void showLineTree(const blink::RenderObject*);
 void showRenderTree(const blink::RenderObject* object1);
 // We don't make object2 an optional parameter so that showRenderTree
 // can be called from gdb easily.
 void showRenderTree(const blink::RenderObject* object1, const blink::RenderObject* object2);
 
 #endif
 
 #endif // RenderObject_h