Clear LayoutSVGText's frame rect if no line boxes are produced

Source/core/layout/svg/LayoutSVGText.cpp

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
  * Copyright (C) 2006 Oliver Hunt <ojh16@student.canterbury.ac.nz>
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010-2012. All rights reserved.
  * Copyright (C) 2012 Google Inc.
  *
@@ skipping 377 matching lines @@
     setLogicalHeight(beforeEdge);
 
     LayoutState state(*this, locationOffset());
     LayoutUnit paintInvalidationLogicalTop = 0;
     LayoutUnit paintInvalidationLogicalBottom = 0;
     layoutInlineChildren(true, paintInvalidationLogicalTop, paintInvalidationLogicalBottom, afterEdge);
 
     if (m_needsReordering)
         m_needsReordering = false;
 
+    // If we don't have any line boxes, then make sure the frame rect is still cleared.
+    if (!firstLineBox())
+        setFrameRect(LayoutRect());
+
     if (!updateCachedBoundariesInParents)
         updateCachedBoundariesInParents = oldBoundaries != objectBoundingBox();
 
     // Invalidate all resources of this client if our layout changed.
     if (everHadLayout() && selfNeedsLayout())
         SVGResourcesCache::clientLayoutChanged(this);
 
     // If our bounds changed, notify the parents.
     if (updateCachedBoundariesInParents)
         LayoutSVGBlock::setNeedsBoundariesUpdate();
@@ skipping 95 matching lines @@
     SVGResourcesCache::clientWillBeRemovedFromTree(child);
 
     Vector<SVGTextLayoutAttributes*, 2> affectedAttributes;
     FontCachePurgePreventer fontCachePurgePreventer;
     subtreeChildWillBeRemoved(child, affectedAttributes);
     LayoutSVGBlock::removeChild(child);
     subtreeChildWasRemoved(affectedAttributes);
 }
 
 }