Revert "Fix a ton of compiler warnings."

chrome/browser/autocomplete/autocomplete.h

Index: chrome/browser/autocomplete/autocomplete.h
diff --git a/chrome/browser/autocomplete/autocomplete.h b/chrome/browser/autocomplete/autocomplete.h
index 4e96102271b2004ae20f908be774b10bcfc3375f..b3ed20b97210fa25faddb3b6d325e6cecbaeb1c0 100644
--- a/chrome/browser/autocomplete/autocomplete.h
+++ b/chrome/browser/autocomplete/autocomplete.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.
 
@@ -466,8 +466,6 @@ class AutocompleteProvider
     // them all again when this is called anyway, so such a parameter wouldn't
     // actually be useful.
     virtual void OnProviderUpdate(bool updated_matches) = 0;
-   protected:
-    ~ACProviderListener() {}
   };
 
   AutocompleteProvider(ACProviderListener* listener,