Index: base/debug/trace_event_impl.h |
diff --git a/base/debug/trace_event_impl.h b/base/debug/trace_event_impl.h |
index 58a44dabf0ef0c5665163bc27ab5436beb417c76..4e93b7e8018473d77353de8450e0d7c660f77d76 100644 |
--- a/base/debug/trace_event_impl.h |
+++ b/base/debug/trace_event_impl.h |
@@ -227,6 +227,9 @@ class BASE_EXPORT TraceLog { |
// data. However, trace macros and methods called within the observer will |
// deadlock. |
virtual void OnTraceLogWillDisable() { } |
+ |
+ protected: |
+ virtual ~EnabledStateChangedObserver() { } |
}; |
void AddEnabledStateObserver(EnabledStateChangedObserver* listener); |
void RemoveEnabledStateObserver(EnabledStateChangedObserver* listener); |