Add hittest mode for Touch-action which ignore inline elements and svg elements

Source/core/rendering/RenderBlock.h

Index: Source/core/rendering/RenderBlock.h
diff --git a/Source/core/rendering/RenderBlock.h b/Source/core/rendering/RenderBlock.h
index de6b5a457f59871a2686b5108367b1ae5b256dfd..58c0722373942d42efa58b327974de83fcbe4011 100644
--- a/Source/core/rendering/RenderBlock.h
+++ b/Source/core/rendering/RenderBlock.h
@@ -115,6 +115,13 @@ public:
         return objects && !objects->isEmpty();
     }
 
+    virtual bool visibleToHitTestRequest(const HitTestRequest& request) const
+    {
+        if (request.touchAction())
+            return style()->visibility() == VISIBLE && style()->pointerEvents() != PE_NONE && !isInert();

[Rick Byers, 2014/02/17 14:43:52]

The general approach of updating visibleToHitTestRequest and making it vritual
seems good to me, thanks!  But it's unfortunate to have to duplicate the normal
(not-touch-action-related) hit test logic in RenderObject, RenderBlock, and
RenderSVGRoot.

How about having the derived functions pass a modified HitTestRequest to the
base that clears the touch action flag?  I.e.

// Touch action hit tests on a RenderBlock are done exactly like normal hit
tests
if (request.touchAction())
  RenderObject::visibleToHitTestRequest(HitTestRequest(request.type() &
~TouchAction);

What do you think?

[gnana, 2014/02/24 18:59:50]

This looks better. modified
Done.

+        return RenderObject::visibleToHitTestRequest(request);
+    }
+
     void addPercentHeightDescendant(RenderBox*);
     static void removePercentHeightDescendant(RenderBox*);
     static bool hasPercentHeightContainerMap();