Add API for hit testing layer_impl touchEventHandlerRegions from the host

webkit/compositor_bindings/web_to_ccinput_handler_adapter.cc

Index: webkit/compositor_bindings/web_to_ccinput_handler_adapter.cc
diff --git a/webkit/compositor_bindings/web_to_ccinput_handler_adapter.cc b/webkit/compositor_bindings/web_to_ccinput_handler_adapter.cc
index 9d68cf34da075354d70fd649c3751d5ae7b1bee0..354e03aab5dbab3d3d4b4139006071d9c1c98b6c 100644
--- a/webkit/compositor_bindings/web_to_ccinput_handler_adapter.cc
+++ b/webkit/compositor_bindings/web_to_ccinput_handler_adapter.cc
@@ -88,6 +88,11 @@ public:
         m_client->scheduleAnimation();
     }
 
+    virtual bool haveTouchEventHandlersAt(WebPoint point)
+    {
+        return m_client->haveTouchEventHandlersAt(point);
+    }
+
 private:
     cc::InputHandlerClient* m_client;
 };