Android: Get rid of extra dup()s on launching child processes

content/browser/file_descriptor_info_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_PUBLIC_BROWSER_FILE_DESCRIPTOR_INFO_IMPL_H_
 #define CONTENT_PUBLIC_BROWSER_FILE_DESCRIPTOR_INFO_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/file_descriptor_info.h"
 
 namespace content {
 
 class FileDescriptorInfoImpl : public FileDescriptorInfo {
  public:
   CONTENT_EXPORT static scoped_ptr<FileDescriptorInfo> Create();
 
   ~FileDescriptorInfoImpl() override;
   void Share(int id, base::PlatformFile fd) override;
   void Transfer(int id, base::ScopedFD fd) override;
   const base::FileHandleMappingVector& GetMapping() const override;
   base::FileHandleMappingVector GetMappingWithIDAdjustment(
       int delta) const override;
   base::PlatformFile GetFDAt(size_t i) const override;
   int GetIDAt(size_t i) const override;
   size_t GetMappingSize() const override;
+  bool OwnsFD(base::PlatformFile file) const override;
+  base::ScopedFD ReleaseFD(base::PlatformFile file) override;
 
  private:
   FileDescriptorInfoImpl();
 
   void AddToMapping(int id, base::PlatformFile fd);
   bool HasID(int id) const;
   base::FileHandleMappingVector mapping_;
   ScopedVector<base::ScopedFD> owned_descriptors_;
 };
 }
 
 #endif  // CONTENT_PUBLIC_BROWSER_FILE_DESCRIPTOR_INFO_IMPL_H_