Virtual destructors should have virtual keyword.

chrome/test/live_sync/live_bookmarks_sync_test.h

 // Copyright (c) 2011 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_TEST_LIVE_SYNC_LIVE_BOOKMARKS_SYNC_TEST_H_
 #define CHROME_TEST_LIVE_SYNC_LIVE_BOOKMARKS_SYNC_TEST_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 156 matching lines @@
   // bookmarks of individual profiles.
   scoped_ptr<BookmarkModelVerifier> verifier_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(LiveBookmarksSyncTest);
 };
 
 class SingleClientLiveBookmarksSyncTest : public LiveBookmarksSyncTest {
  public:
   SingleClientLiveBookmarksSyncTest()
       : LiveBookmarksSyncTest(SINGLE_CLIENT) {}
-  ~SingleClientLiveBookmarksSyncTest() {}
+  virtual ~SingleClientLiveBookmarksSyncTest() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SingleClientLiveBookmarksSyncTest);
 };
 
 class TwoClientLiveBookmarksSyncTest : public LiveBookmarksSyncTest {
  public:
   TwoClientLiveBookmarksSyncTest()
       : LiveBookmarksSyncTest(TWO_CLIENT) {}
-  ~TwoClientLiveBookmarksSyncTest() {}
+  virtual ~TwoClientLiveBookmarksSyncTest() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TwoClientLiveBookmarksSyncTest);
 };
 
 class MultipleClientLiveBookmarksSyncTest : public LiveBookmarksSyncTest {
  public:
   MultipleClientLiveBookmarksSyncTest()
       : LiveBookmarksSyncTest(MULTIPLE_CLIENT) {}
-  ~MultipleClientLiveBookmarksSyncTest() {}
+  virtual ~MultipleClientLiveBookmarksSyncTest() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MultipleClientLiveBookmarksSyncTest);
 };
 
 class ManyClientLiveBookmarksSyncTest : public LiveBookmarksSyncTest {
  public:
   ManyClientLiveBookmarksSyncTest()
       : LiveBookmarksSyncTest(MANY_CLIENT) {}
-  ~ManyClientLiveBookmarksSyncTest() {}
+  virtual ~ManyClientLiveBookmarksSyncTest() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ManyClientLiveBookmarksSyncTest);
 };
 
 #endif  // CHROME_TEST_LIVE_SYNC_LIVE_BOOKMARKS_SYNC_TEST_H_