Sang's initial CL for moving the file interface out of dev.

ppapi/cpp/file_ref.h

Index: ppapi/cpp/file_ref.h
===================================================================
--- ppapi/cpp/file_ref.h	(revision 0)
+++ ppapi/cpp/file_ref.h	(revision 0)
@@ -0,0 +1,66 @@
+// Copyright (c) 2011 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_CPP_FILE_REF_H_
+#define PPAPI_CPP_FILE_REF_H_
+
+#include "ppapi/c/pp_stdint.h"
+#include "ppapi/c/ppb_file_ref.h"
+#include "ppapi/cpp/resource.h"
+#include "ppapi/cpp/var.h"
+
+namespace pp {
+
+class CompletionCallback;
+class FileSystem;
+
+class FileRef: public Resource {
+ public:
+  // Creates an is_null() FileRef object.
+  FileRef() {}
+
+  // This constructor is used when we've gotten a PP_Resource as a return value
+  // that we need to addref.
+  explicit FileRef(PP_Resource resource);
+
+  // This constructor is used when we've gotten a PP_Resource as a return value
+  // that has already been addref'ed for us.
+  struct PassRef {};
+  FileRef(PassRef, PP_Resource resource);
+
+  // Creates a FileRef pointing to a path in the given filesystem.
+  FileRef(const FileSystem& file_system, const char* path);
+
+  FileRef(const FileRef& other);
+
+  // Returns the file system type.
+  PP_FileSystemType GetFileSystemType() const;
+
+  // Returns the name of the file.
+  Var GetName() const;
+
+  // Returns the absolute path of the file.  See PPB_FileRef::GetPath for more
+  // details.
+  Var GetPath() const;
+
+  // Returns the parent directory of this file.  See PPB_FileRef::GetParent for
+  // more details.
+  FileRef GetParent() const;
+
+  int32_t MakeDirectory(const CompletionCallback& cc);
+
+  int32_t MakeDirectoryIncludingAncestors(const CompletionCallback& cc);
+
+  int32_t Touch(PP_Time last_access_time,
+                PP_Time last_modified_time,
+                const CompletionCallback& cc);
+
+  int32_t Delete(const CompletionCallback& cc);
+
+  int32_t Rename(const FileRef& new_file_ref, const CompletionCallback& cc);
+};
+
+}  // namespace pp
+
+#endif  // PPAPI_CPP_FILE_REF_H_