Revert "Fix a ton of compiler warnings."

chrome/browser/browsing_data_remover.h

Index: chrome/browser/browsing_data_remover.h
diff --git a/chrome/browser/browsing_data_remover.h b/chrome/browser/browsing_data_remover.h
index 3f2bbbb6062e849584867a37e53eaca1fbb20edd..0425c6f6a7baad15ec8ab4b9f703940ac8962601 100644
--- a/chrome/browser/browsing_data_remover.h
+++ b/chrome/browser/browsing_data_remover.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2006-2008 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.
 
@@ -41,8 +41,6 @@ class BrowsingDataRemover : public NotificationObserver {
   class Observer {
    public:
     virtual void OnBrowsingDataRemoverDone() = 0;
-   protected:
-    ~Observer() {}
   };
 
   // Creates a BrowsingDataRemover to remove browser data from the specified