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

ppapi/proxy/proxy_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 PPAPI_PROXY_PROXY_CHANNEL_H_
 #define PPAPI_PROXY_PROXY_CHANNEL_H_
 
 #include <memory>
 
 #include "base/files/scoped_file.h"
@@ skipping 84 matching lines @@
   bool Send(IPC::Message* msg) override;
 
   // IPC::Listener implementation.
   void OnChannelError() override;
 
   // Will be NULL in some unit tests and if the remote side has crashed.
   IPC::SyncChannel* channel() const {
     return channel_.get();
   }
 
-#if defined(OS_POSIX) && !defined(OS_NACL)
-  base::ScopedFD TakeRendererFD();
-#endif
-
  protected:
   explicit ProxyChannel();
 
   // You must call this function before anything else. Returns true on success.
   // The delegate pointer must outlive this class, ownership is not
   // transferred.
   virtual bool InitWithChannel(Delegate* delegate,
                                base::ProcessId peer_pid,
                                const IPC::ChannelHandle& channel_handle,
                                bool is_client);
@@ skipping 20 matching lines @@
   // remote side has crashed.
   std::unique_ptr<IPC::SyncChannel> channel_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyChannel);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PROXY_CHANNEL_H_