Revert of Revert of Divorce PaintInvalidationState from LayoutState

Source/core/rendering/svg/RenderSVGContainer.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  *
  * 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 34 matching lines @@
 }
 
 RenderSVGContainer::~RenderSVGContainer()
 {
 }
 
 void RenderSVGContainer::layout()
 {
     ASSERT(needsLayout());
 
-    // RenderSVGRoot disables layoutState for the SVG rendering tree.
-    ASSERT(!view()->layoutStateCachedOffsetsEnabled());
-
     // Allow RenderSVGViewportContainer to update its viewport.
     calcViewport();
 
     // Allow RenderSVGTransformableContainer to update its transform.
     bool updatedTransform = calculateLocalTransform();
 
     // RenderSVGViewportContainer needs to set the 'layout size changed' flag.
     determineIfLayoutSizeChanged();
 
     SVGRenderSupport::layoutChildren(this, selfNeedsLayout() || SVGRenderSupport::filtersForceContainerLayout(this));
@@ skipping 123 matching lines @@
         if (objectBoundingBox().contains(localPoint)) {
             updateHitTestResult(result, roundedLayoutPoint(localPoint));
             return true;
         }
     }
     // 16.4: "If there are no graphics elements whose relevant graphics content is under the pointer (i.e., there is no target element), the event is not dispatched."
     return false;
 }
 
 }