Turn FileDescriptorInfo a collection class

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();
+
+  virtual ~FileDescriptorInfoImpl();
+  virtual void Share(int id, base::PlatformFile fd) OVERRIDE;
+  virtual void Transfer(int id, base::ScopedFD fd) OVERRIDE;
+  virtual const base::FileHandleMappingVector& GetMapping() const OVERRIDE;
+  virtual base::FileHandleMappingVector GetMappingWithIDAdjustment(
+      int delta) const OVERRIDE;
+  virtual base::PlatformFile GetFDAt(size_t i) const OVERRIDE;
+  virtual int GetIDAt(size_t i) const OVERRIDE;
+  virtual size_t GetMappingSize() const 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_