Remove the SVG paint culling optimization

Source/core/rendering/svg/RenderSVGBlock.cpp

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010. 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 108 matching lines @@
 {
     ASSERT_NOT_REACHED();
     return false;
 }
 
 void RenderSVGBlock::invalidateTreeIfNeeded(const PaintInvalidationState& paintInvalidationState)
 {
     if (!shouldCheckForPaintInvalidation(paintInvalidationState))
         return;
 
+    if (paintInvalidationState.cachedOffsetsEnabled()) {
+        m_cachedPaintInvalidationTransform = paintInvalidationState.svgTransform();
+    } else {
+        AffineTransform transform = localTransform();

[fs, 2014/12/19 11:46:00]

This shouldn't be included, because it's included in updatePaintInfoRect (and
not included in the cached-part of the if-else).

[pdr., 2014/12/19 18:39:15]

Done

+        RenderObject* next = parent();
+        while (!next->isSVGRoot()) {
+            transform = next->localToParentTransform() * transform;
+            next = next->parent();
+            ASSERT(next);
+        }
+        m_cachedPaintInvalidationTransform = toRenderSVGRoot(next)->localToBorderBoxTransform() * transform;
+    }
+
     ForceHorriblySlowRectMapping slowRectMapping(&paintInvalidationState);
     RenderBlockFlow::invalidateTreeIfNeeded(paintInvalidationState);
 }
 
+void RenderSVGBlock::updatePaintInfoRect(IntRect& rect)
+{
+    if (rect != LayoutRect::infiniteRect()) {
+        AffineTransform transformToRoot = m_cachedPaintInvalidationTransform * localTransform();
+        rect = enclosingIntRect(transformToRoot.inverse().mapRect(FloatRect(rect)));
+    }
 }
+
+}