GTTF: Add missing virtual destructors.

chrome/browser/spellchecker/spellcheck_hunspell_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_HUNSPELL_DICTIONARY_H_
 #define CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_HUNSPELL_DICTIONARY_H_
 
 #include "chrome/browser/spellchecker/spellcheck_dictionary.h"
 
 #include "base/file_path.h"
@@ skipping 13 matching lines @@
 
 // Defines the browser-side hunspell dictionary and provides access to it.
 class SpellcheckHunspellDictionary
     : public SpellcheckDictionary,
       public net::URLFetcherDelegate,
       public base::SupportsWeakPtr<SpellcheckHunspellDictionary> {
  public:
   // Interface to implement for observers of the Hunspell dictionary.
   class Observer {
    public:
+    virtual ~Observer() { }
+
     // The dictionary has been initialized.
     virtual void OnHunspellDictionaryInitialized() = 0;
 
     // Dictionary download began.
     virtual void OnHunspellDictionaryDownloadBegin() = 0;
 
     // Dictionary download succeeded.
     virtual void OnHunspellDictionaryDownloadSuccess() = 0;
 
     // Dictionary download failed.
@@ skipping 108 matching lines @@
   // Observers of Hunspell dictionary events.
   ObserverList<Observer> observers_;
 
   // Status of the dictionary download.
   DownloadStatus download_status_;
 
   DISALLOW_COPY_AND_ASSIGN(SpellcheckHunspellDictionary);
 };
 
 #endif  // CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_HUNSPELL_DICTIONARY_H_