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

Source/WebCore/rendering/InlineFlowBox.cpp

Index: Source/WebCore/rendering/InlineFlowBox.cpp
===================================================================
--- Source/WebCore/rendering/InlineFlowBox.cpp	(revision 148175)
+++ Source/WebCore/rendering/InlineFlowBox.cpp	(working copy)
@@ -1066,7 +1066,7 @@
     flipForWritingMode(rect);
     rect.moveBy(accumulatedOffset);
 
-    if (visibleToHitTesting() && locationInContainer.intersects(rect)) {
+    if (visibleToHitTestRequest(request) && locationInContainer.intersects(rect)) {
         renderer()->updateHitTestResult(result, flipForWritingMode(locationInContainer.point() - toLayoutSize(accumulatedOffset))); // Don't add in m_x or m_y here, we want coords in the containing block's space.
         if (!result.addNodeToRectBasedTestResult(renderer()->node(), request, locationInContainer, rect))
             return true;