Virtual destructors should have virtual keyword.

content/browser/renderer_host/browser_render_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_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_H_
 #pragma once
 
 #include <map>
 #include <queue>
@@ skipping 26 matching lines @@
 //
 // This object communicates back and forth with the RenderProcess object
 // running in the renderer process. Each RenderProcessHost and RenderProcess
 // keeps a list of RenderView (renderer) and TabContents (browser) which
 // are correlated with IDs. This way, the Views and the corresponding ViewHosts
 // communicate through the two process objects.
 class BrowserRenderProcessHost : public RenderProcessHost,
                                  public ChildProcessLauncher::Client {
  public:
   explicit BrowserRenderProcessHost(Profile* profile);
-  ~BrowserRenderProcessHost();
+  virtual ~BrowserRenderProcessHost();
 
   // RenderProcessHost implementation (public portion).
   virtual bool Init(bool is_accessibility_enabled);
   virtual int GetNextRoutingID();
   virtual void CancelResourceRequests(int render_widget_id);
   virtual void CrossSiteSwapOutACK(const ViewMsg_SwapOut_Params& params);
   virtual bool WaitForUpdateMsg(int render_widget_id,
                                 const base::TimeDelta& max_delay,
                                 IPC::Message* msg);
   virtual void ReceivedBadMessage();
@@ skipping 83 matching lines @@
   // Messages we queue while waiting for the process handle.  We queue them here
   // instead of in the channel so that we ensure they're sent after init related
   // messages that are sent once the process handle is available.  This is
   // because the queued messages may have dependencies on the init messages.
   std::queue<IPC::Message*> queued_messages_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserRenderProcessHost);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_H_