Remove the SVG paint culling optimization

Source/core/paint/SVGForeignObjectPainter.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/paint/SVGForeignObjectPainter.h"
 
 #include "core/paint/BlockPainter.h"
 #include "core/rendering/PaintInfo.h"
 #include "core/rendering/svg/RenderSVGForeignObject.h"
 #include "core/rendering/svg/SVGRenderSupport.h"
 #include "core/rendering/svg/SVGRenderingContext.h"
 #include "platform/graphics/GraphicsContextStateSaver.h"
 
 namespace blink {
 
 void SVGForeignObjectPainter::paint(const PaintInfo& paintInfo)
 {
     if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection)
         return;
 
     PaintInfo childPaintInfo(paintInfo);
     GraphicsContextStateSaver stateSaver(*childPaintInfo.context);
     childPaintInfo.applyTransform(m_renderSVGForeignObject.localTransform());
 
+    // When transitioning from SVG to block painters we need to keep the PaintInfo rect up-to-date
+    // because it can be used for clipping.
+    AffineTransform transformToRoot = m_renderSVGForeignObject.cachedPaintInvalidationTransform() * m_renderSVGForeignObject.localTransform();

[fs, 2014/12/17 10:16:10]

Nit: Move this into the if-scope?

[pdr., 2014/12/18 22:22:40]

Done

+    if (childPaintInfo.rect != LayoutRect::infiniteRect())
+        childPaintInfo.rect = enclosingIntRect(transformToRoot.inverse().mapRect(FloatRect(childPaintInfo.rect)));
+
     if (SVGRenderSupport::isOverflowHidden(&m_renderSVGForeignObject))
         childPaintInfo.context->clip(m_renderSVGForeignObject.viewportRect());
 
     SVGRenderingContext renderingContext;
     bool continueRendering = true;
     if (paintInfo.phase == PaintPhaseForeground) {
         renderingContext.prepareToRenderSVGContent(&m_renderSVGForeignObject, childPaintInfo);
         continueRendering = renderingContext.isRenderingPrepared();
     }
 
@@ skipping 10 matching lines @@
             BlockPainter(m_renderSVGForeignObject).paint(childPaintInfo, childPoint);
             childPaintInfo.phase = PaintPhaseForeground;
             BlockPainter(m_renderSVGForeignObject).paint(childPaintInfo, childPoint);
             childPaintInfo.phase = PaintPhaseOutline;
             BlockPainter(m_renderSVGForeignObject).paint(childPaintInfo, childPoint);
         }
     }
 }
 
 } // namespace blink