GTTF: Add missing virtual destructors.

chrome/browser/spellchecker/spellcheck_custom_dictionary.h

 // 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.
 
 #ifndef CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_CUSTOM_DICTIONARY_H_
 #define CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_CUSTOM_DICTIONARY_H_
 
 #include <string>
 
 #include "base/file_path.h"
@@ skipping 49 matching lines @@
     // The words to be added.
     chrome::spellcheck_common::WordList to_add_;
 
     // The words to be removed.
     chrome::spellcheck_common::WordList to_remove_;
   };
 
   // Interface to implement for dictionary load and change observers.
   class Observer {
    public:
+    virtual ~Observer() { }
+
     // Called when the custom dictionary has been loaded.
     virtual void OnCustomDictionaryLoaded() = 0;
 
     // Called when the custom dictionary has been changed.
     virtual void OnCustomDictionaryChanged(const Change& dictionary_change) = 0;
   };
 
   explicit SpellcheckCustomDictionary(const FilePath& path);
   virtual ~SpellcheckCustomDictionary();
 
@@ skipping 95 matching lines @@
   // Used to send sync-related errors to the sync infrastructure.
   scoped_ptr<syncer::SyncErrorFactory> sync_error_handler_;
 
   // True if the dictionary has been loaded. Otherwise false.
   bool is_loaded_;
 
   DISALLOW_COPY_AND_ASSIGN(SpellcheckCustomDictionary);
 };
 
 #endif  // CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_CUSTOM_DICTIONARY_H_