Refactoring: Make IPC::Channel::TakeClientFileDescriptor() a ScopedFD.

ppapi/proxy/proxy_channel.cc

 // 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.
 
 #include "ppapi/proxy/proxy_channel.h"
 
 #include "base/logging.h"
 #include "ipc/ipc_platform_file.h"
 #include "ipc/ipc_test_sink.h"
 
@@ skipping 35 matching lines @@
 #if !defined(OS_NACL)
   peer_pid_ = base::GetCurrentProcId();
 #endif
 }
 
 void ProxyChannel::OnChannelError() {
   channel_.reset();
 }
 
 #if defined(OS_POSIX) && !defined(OS_NACL)
-int ProxyChannel::TakeRendererFD() {
+base::ScopedFD ProxyChannel::TakeRendererFD() {
   DCHECK(channel());
   return channel()->TakeClientFileDescriptor();
 }
 #endif
 
 IPC::PlatformFileForTransit ProxyChannel::ShareHandleWithRemote(
       base::PlatformFile handle,
       bool should_close_source) {
   // Channel could be closed if the plugin crashes.
   if (!channel_.get()) {
@@ skipping 13 matching lines @@
   if (channel_.get())
     return channel_->Send(msg);
 
   // Remote side crashed, drop this message.
   delete msg;
   return false;
 }
 
 }  // namespace proxy
 }  // namespace ppapi