1 files changed, 4 insertions, 3 deletions
diff --git a/base/synchronization/waitable_event_watcher.h b/base/synchronization/waitable_event_watcher.h
index 1512acc..7e1698b 100644
--- a/base/synchronization/waitable_event_watcher.h
+++ b/base/synchronization/waitable_event_watcher.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -72,8 +72,6 @@ class BASE_EXPORT WaitableEventWatcher
 
   class BASE_EXPORT Delegate {
    public:
-    virtual ~Delegate() { }
-
     // -------------------------------------------------------------------------
     // This is called on the MessageLoop thread when WaitableEvent has been
     // signaled.
@@ -83,6 +81,9 @@ class BASE_EXPORT WaitableEventWatcher
     // the past.
     // -------------------------------------------------------------------------
     virtual void OnWaitableEventSignaled(WaitableEvent* waitable_event) = 0;
+
+   protected:
+    virtual ~Delegate() { }
   };
 
   // ---------------------------------------------------------------------------