Rewrite release event only if press event was rewritten for a given device.

ui/events/test/events_test_utils_x11.h

Index: ui/events/test/events_test_utils_x11.h
diff --git a/ui/events/test/events_test_utils_x11.h b/ui/events/test/events_test_utils_x11.h
index 5f59dd523259f6d3636818830f9132320ef24172..0be6fddcf766232d682dc9b5a9f5b82285902474 100644
--- a/ui/events/test/events_test_utils_x11.h
+++ b/ui/events/test/events_test_utils_x11.h
@@ -41,6 +41,10 @@ class ScopedXI2Event {
   void InitButtonEvent(EventType type,
                        int flags);
 
+  void InitGenericButtonEvent(int deviceid,
+                              EventType type,
+                              int flags);
+
   void InitMouseWheelEvent(int wheel_delta,
                            int flags);