Remove obsolete methods from IPC::Channel and related classes.

content/public/common/child_process_host.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 CONTENT_PUBLIC_COMMON_CHILD_PROCESS_HOST_H_
 #define CONTENT_PUBLIC_COMMON_CHILD_PROCESS_HOST_H_
 
 #include <stdint.h>
 
 #include "base/files/scoped_file.h"
@@ skipping 83 matching lines @@
   // Returns true iff the IPC channel is currently being opened;
   virtual bool IsChannelOpening() = 0;
 
   // Adds an IPC message filter.  A reference will be kept to the filter.
   virtual void AddFilter(IPC::MessageFilter* filter) = 0;
 
   // Returns the service_manager::InterfaceProvider the process host can use to
   // bind
   // interfaces exposed to it from the child.
   virtual service_manager::InterfaceProvider* GetRemoteInterfaces() = 0;
-
-#if defined(OS_POSIX)
-  // See IPC::Channel::TakeClientFileDescriptor.
-  virtual base::ScopedFD TakeClientFileDescriptor() = 0;
-#endif
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_CHILD_PROCESS_HOST_H_