Virtual destructors should have virtual keyword.

content/renderer/gpu_channel_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_RENDERER_GPU_CHANNEL_HOST_H_
 #define CONTENT_RENDERER_GPU_CHANNEL_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 24 matching lines @@
     kUnconnected,
     // Ready to use.
     kConnected,
     // An error caused the host to become disconnected. Recreate channel to
     // reestablish connection.
     kLost
   };
 
   // Called on the render thread
   GpuChannelHost();
-  ~GpuChannelHost();
+  virtual ~GpuChannelHost();
 
   // Connect to GPU process channel.
   void Connect(const IPC::ChannelHandle& channel_handle,
                base::ProcessHandle renderer_process_for_gpu);
 
   State state() const { return state_; }
 
   // Change state to kLost.
   void SetStateLost();
 
@@ skipping 58 matching lines @@
   scoped_refptr<GpuVideoServiceHost> gpu_video_service_host_;
 
   // This is a MessageFilter to intercept IPC messages related to transport
   // textures. These messages are routed to TransportTextureHost.
   scoped_refptr<TransportTextureService> transport_texture_service_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
 };
 
 #endif  // CONTENT_RENDERER_GPU_CHANNEL_HOST_H_