Virtual destructors should have virtual keyword.

content/browser/worker_host/worker_process_host.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_BROWSER_WORKER_HOST_WORKER_PROCESS_HOST_H_
 #define CONTENT_BROWSER_WORKER_HOST_WORKER_PROCESS_HOST_H_
 #pragma once
 
 #include <list>
 
@@ skipping 99 matching lines @@
     int parent_appcache_host_id_;
     int64 main_resource_appcache_id_;
     FilterList filters_;
     scoped_refptr<WorkerDocumentSet> worker_document_set_;
     const content::ResourceContext* const resource_context_;
   };
 
   WorkerProcessHost(
       const content::ResourceContext* resource_context,
       ResourceDispatcherHost* resource_dispatcher_host);
-  ~WorkerProcessHost();
+  virtual ~WorkerProcessHost();
 
   // Starts the process.  Returns true iff it succeeded.
   // |render_process_id| is the renderer process responsible for starting this
   // worker.
   bool Init(int render_process_id);
 
   // Creates a worker object in the process.
   void CreateWorker(const WorkerInstance& instance);
 
   // Returns true iff the given message from a renderer process was forwarded to
@@ skipping 60 matching lines @@
   // keep this around since we'll use it when forward messages to the worker
   // process.
   scoped_refptr<WorkerMessageFilter> worker_message_filter_;
 
   ResourceDispatcherHost* const resource_dispatcher_host_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkerProcessHost);
 };
 
 #endif  // CONTENT_BROWSER_WORKER_HOST_WORKER_PROCESS_HOST_H_