Virtual destructors should have virtual keyword.

content/common/quota_dispatcher.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 CONTENT_COMMON_QUOTA_DISPATCHER_H_
 #define CONTENT_COMMON_QUOTA_DISPATCHER_H_
 
 #include <map>
 #include <set>
 
@@ skipping 12 matching lines @@
 namespace WebKit {
 class WebStorageQuotaCallbacks;
 }
 
 // Dispatches and sends quota related messages sent to/from a child
 // process from/to the main browser process.  There is one instance
 // per child process.  Messages are dispatched on the main child thread.
 class QuotaDispatcher : public IPC::Channel::Listener {
  public:
   QuotaDispatcher();
-  ~QuotaDispatcher();
+  virtual ~QuotaDispatcher();
 
   // IPC::Channel::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
   void QueryStorageUsageAndQuota(const GURL& gurl,
                                  WebKit::WebStorageQuotaType type,
                                  WebKit::WebStorageQuotaCallbacks* callbacks);
   void RequestStorageQuota(const GURL& gurl,
                            WebKit::WebStorageQuotaType type,
                            unsigned long long requested_size,
                            WebKit::WebStorageQuotaCallbacks* callbacks);
 
  private:
   // Message handlers.
   void DidQueryStorageUsageAndQuota(int request_id,
                                     int64 current_usage,
                                     int64 current_quota);
   void DidGrantStorageQuota(int request_id,
                             int64 granted_quota);
   void DidFail(int request_id,
                WebKit::WebStorageQuotaError error);
 
   IDMap<WebKit::WebStorageQuotaCallbacks> pending_quota_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(QuotaDispatcher);
 };
 
 #endif  // CONTENT_COMMON_QUOTA_DISPATCHER_H_