Add hit testing mode which ignores pointer-events:none.

Source/WebCore/rendering/RenderTable.cpp

Index: Source/WebCore/rendering/RenderTable.cpp
===================================================================
--- Source/WebCore/rendering/RenderTable.cpp	(revision 148175)
+++ Source/WebCore/rendering/RenderTable.cpp	(working copy)
@@ -1395,7 +1395,7 @@
 
     // Check our bounds next.
     LayoutRect boundsRect(adjustedLocation, size());
-    if (visibleToHitTesting() && (action == HitTestBlockBackground || action == HitTestChildBlockBackground) && locationInContainer.intersects(boundsRect)) {
+    if (visibleToHitTestRequest(request) && (action == HitTestBlockBackground || action == HitTestChildBlockBackground) && locationInContainer.intersects(boundsRect)) {
         updateHitTestResult(result, flipForWritingMode(locationInContainer.point() - toLayoutSize(adjustedLocation)));
         if (!result.addNodeToRectBasedTestResult(node(), request, locationInContainer, boundsRect))
             return true;