RefCounted types should not have public destructors, delegate cleanup

ipc/ipc_channel.h

 // Copyright (c) 2012 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 IPC_IPC_CHANNEL_H_
 #define IPC_IPC_CHANNEL_H_
 #pragma once
 
 #include <string>
 
@@ skipping 32 matching lines @@
 // currently used by automation and service processes.
 
 class IPC_EXPORT Channel : public Sender {
   // Security tests need access to the pipe handle.
   friend class ChannelTest;
 
  public:
   // IPC::Listener used to be IPC::Channel::Listener which prevented forward
   // declarations. To keep existing code compiling, we provide this
   // backwards-compatible definition. New code should use IPC::Listener.
-  // TODO(brettw) converto users of this and delete.
+  // TODO(brettw) convert users of this and delete.
   typedef IPC::Listener Listener;
 
   // Flags to test modes
   enum ModeFlags {
     MODE_NO_FLAG = 0x0,
     MODE_SERVER_FLAG = 0x1,
     MODE_CLIENT_FLAG = 0x2,
     MODE_NAMED_FLAG = 0x4,
 #if defined(OS_POSIX)
     MODE_OPEN_ACCESS_FLAG = 0x8, // Don't restrict access based on client UID.
@@ skipping 146 matching lines @@
 
  private:
   // PIMPL to which all channel calls are delegated.
   class ChannelImpl;
   ChannelImpl *channel_impl_;
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_H_