Allow hitting the SVG root when its display-type is 'block'

Source/core/rendering/svg/RenderSVGRoot.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007, 2008, 2009 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) Research In Motion Limited 2011. 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
@@ skipping 430 matching lines @@
             // FIXME: nodeAtFloatPoint() doesn't handle rect-based hit tests yet.
             if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) {
                 updateHitTestResult(result, pointInBorderBox);
                 if (!result.addNodeToRectBasedTestResult(child->node(), request, locationInContainer))
                     return true;
             }
         }
     }
 
     // If we didn't early exit above, we've just hit the container <svg> element. Unlike SVG 1.1, 2nd Edition allows container elements to be hit.
-    if (hitTestAction == HitTestBlockBackground && visibleToHitTestRequest(request)) {
-        // Only return true here, if the last hit testing phase 'BlockBackground' is executed. If we'd return true in the 'Foreground' phase,
-        // hit testing would stop immediately. For SVG only trees this doesn't matter. Though when we have a <foreignObject> subtree we need
-        // to be able to detect hits on the background of a <div> element. If we'd return true here in the 'Foreground' phase, we are not able
-        // to detect these hits anymore.
+    if ((hitTestAction == HitTestBlockBackground || hitTestAction == HitTestChildBlockBackground) && visibleToHitTestRequest(request)) {
+        // Only return true here, if the last hit testing phase 'BlockBackground' (or 'ChildBlockBackground' - depending on context) is executed.
+        // If we'd return true in the 'Foreground' phase, hit testing would stop immediately. For SVG only trees this doesn't matter.
+        // Though when we have a <foreignObject> subtree we need to be able to detect hits on the background of a <div> element.
+        // If we'd return true here in the 'Foreground' phase, we are not able to detect these hits anymore.
         LayoutRect boundsRect(accumulatedOffset + location(), size());
         if (locationInContainer.intersects(boundsRect)) {
             updateHitTestResult(result, pointInBorderBox);
             if (!result.addNodeToRectBasedTestResult(node(), request, locationInContainer, boundsRect))
                 return true;
         }
     }
 
     return false;
 }
 
 }