Add pointer-events="bounding-box" for svg content.

Source/core/rendering/PointerEventsHitRules.cpp

 /*
     Copyright (C) 2007 Rob Buis <buis@kde.org>
 
     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.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 10 matching lines @@
 #include "core/rendering/PointerEventsHitRules.h"
 
 namespace WebCore {
 
 PointerEventsHitRules::PointerEventsHitRules(EHitTesting hitTesting, const HitTestRequest& request, EPointerEvents pointerEvents)
     : requireVisible(false)
     , requireFill(false)
     , requireStroke(false)
     , canHitStroke(false)
     , canHitFill(false)
+    , canHitBoundingBox(false)
 {
     if (request.svgClipContent())
         pointerEvents = PE_FILL;
 
     if (hitTesting == SVG_GEOMETRY_HITTESTING) {
         switch (pointerEvents)
         {
+            case PE_BOUNDINGBOX:
+                canHitBoundingBox = true;
+                break;
             case PE_VISIBLE_PAINTED:
             case PE_AUTO: // "auto" is like "visiblePainted" when in SVG content
                 requireFill = true;
                 requireStroke = true;
             case PE_VISIBLE:
                 requireVisible = true;
                 canHitFill = true;
                 canHitStroke = true;
                 break;
             case PE_VISIBLE_FILL:
@@ skipping 17 matching lines @@
             case PE_STROKE:
                 canHitStroke = true;
                 break;
             case PE_NONE:
                 // nothing to do here, defaults are all false.
                 break;
         }
     } else {
         switch (pointerEvents)
         {
+            case PE_BOUNDINGBOX:
+                canHitBoundingBox = true;
+                break;
             case PE_VISIBLE_PAINTED:
             case PE_AUTO: // "auto" is like "visiblePainted" when in SVG content
                 requireVisible = true;
                 requireFill = true;
                 requireStroke = true;
                 canHitFill = true;
                 canHitStroke = true;
                 break;
             case PE_VISIBLE_FILL:
             case PE_VISIBLE_STROKE:
@@ skipping 17 matching lines @@
             case PE_NONE:
                 // nothing to do here, defaults are all false.
                 break;
         }
     }
 }
 
 }
 
 // vim:ts=4:noet