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

content/common/child_process_host_impl.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_COMMON_CHILD_PROCESS_HOST_IMPL_H_
 #define CONTENT_COMMON_CHILD_PROCESS_HOST_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 43 matching lines @@
   // This will never return ChildProcessHost::kInvalidUniqueID.
   static int GenerateChildProcessUniqueId();
 
   // ChildProcessHost implementation
   virtual bool Send(IPC::Message* message) override;
   virtual void ForceShutdown() override;
   virtual std::string CreateChannel() override;
   virtual bool IsChannelOpening() override;
   virtual void AddFilter(IPC::MessageFilter* filter) override;
 #if defined(OS_POSIX)
-  virtual int TakeClientFileDescriptor() override;
+  virtual base::ScopedFD TakeClientFileDescriptor() override;
 #endif
 
  private:
   friend class ChildProcessHost;
 
   explicit ChildProcessHostImpl(ChildProcessHostDelegate* delegate);
 
   // IPC::Listener methods:
   virtual bool OnMessageReceived(const IPC::Message& msg) override;
   virtual void OnChannelConnected(int32 peer_pid) override;
@@ skipping 25 matching lines @@
   // thread, we don't have a IPC::ChannelProxy and so we manage filters
   // manually.
   std::vector<scoped_refptr<IPC::MessageFilter> > filters_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_CHILD_PROCESS_HOST_IMPL_H_