Don't propagate bbox for empty <text> to ancestors

third_party/WebKit/Source/core/layout/svg/SVGLayoutSupport.cpp

 /*
  * Copyright (C) 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@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>
  * Copyright (C) Research In Motion Limited 2009-2010. 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
@@ skipping 178 matching lines @@
     // the resources applied to the children (such as clips and filters). This allows filters applied to containers to correctly bound
     // the children, and also improves inlining of SVG content, as the stroke bound is used in that situation also.
     for (LayoutObject* current = container->slowFirstChild(); current; current = current->nextSibling()) {
         if (current->isSVGHiddenContainer())
             continue;
 
         // Don't include elements in the union that do not layout.
         if (current->isSVGShape() && toLayoutSVGShape(current)->isShapeEmpty())
             continue;
 
+        if (current->isSVGText() && !toLayoutSVGText(current)->isObjectBoundingBoxValid())
+            continue;
+
         const AffineTransform& transform = current->localToParentTransform();
         updateObjectBoundingBox(objectBoundingBox, objectBoundingBoxValid, current,
             transform.mapRect(current->objectBoundingBox()));
         strokeBoundingBox.unite(transform.mapRect(current->paintInvalidationRectInLocalCoordinates()));
     }
 
     paintInvalidationBoundingBox = strokeBoundingBox;
 }
 
 const LayoutSVGRoot* SVGLayoutSupport::findTreeRootObject(const LayoutObject* start)
@@ skipping 269 matching lines @@
 
     // FIXME: trying to compute a device space transform at record time is wrong. All clients
     // should be updated to avoid relying on this information, and the method should be removed.
     AffineTransform ctm = deprecatedCalculateTransformToLayer(layoutObject) * SubtreeContentTransformScope::currentContentTransformation();
     ctm.scale(layoutObject->document().frameHost()->deviceScaleFactor());
 
     return narrowPrecisionToFloat(sqrt((pow(ctm.xScale(), 2) + pow(ctm.yScale(), 2)) / 2));
 }
 
 } // namespace blink