RefCounted types should not have public destructors, content/browser part 2

content/common/gpu/gpu_channel.h

Index: content/common/gpu/gpu_channel.h
diff --git a/content/common/gpu/gpu_channel.h b/content/common/gpu/gpu_channel.h
index d9c51922c7153873401eef30fca646b20a5f98e5..42e4d8b0fe099c77e2180400d0823a63cbd68e86 100644
--- a/content/common/gpu/gpu_channel.h
+++ b/content/common/gpu/gpu_channel.h
@@ -45,7 +45,6 @@ class GpuChannel : public IPC::Channel::Listener,
              gfx::GLShareGroup* share_group,
              int client_id,
              bool software);
-  virtual ~GpuChannel();
 
   bool Init(base::MessageLoopProxy* io_message_loop,
             base::WaitableEvent* shutdown_event);
@@ -106,7 +105,12 @@ class GpuChannel : public IPC::Channel::Listener,
   // discrete GPU even if they would otherwise use the integrated GPU.
   bool ShouldPreferDiscreteGpu() const;
 
+ protected:
+  virtual ~GpuChannel();
+
  private:
+  friend class base::RefCountedThreadSafe<GpuChannel>;
+
   void OnDestroy();
 
   bool OnControlMessageReceived(const IPC::Message& msg);