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 b8bb602d8ee689205372a6ae543da14a0f0ad308..408890d6b1316f8f7fa38c1e41b886b57d6bac4b 100644
--- a/webkit/compositor_bindings/web_to_ccinput_handler_adapter.cc
+++ b/webkit/compositor_bindings/web_to_ccinput_handler_adapter.cc
@@ -90,6 +90,11 @@ public:
         m_client->scheduleAnimation();
     }
 
+    virtual bool checkTouchEventHandlerRegionHit(WebPoint point)
+    {
+        return m_client->checkTouchEventHandlerRegionHit(point);
+    }
+
 private:
     cc::InputHandlerClient* m_client;
 };