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

ppapi/c/ppb_file_ref.h

Index: ppapi/c/ppb_file_ref.h
===================================================================
--- ppapi/c/ppb_file_ref.h	(revision 0)
+++ ppapi/c/ppb_file_ref.h	(revision 0)
@@ -0,0 +1,81 @@
+/* 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_C_PPB_FILE_REF_H_
+#define PPAPI_C_PPB_FILE_REF_H_
+
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/c/pp_file_info.h"
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_resource.h"
+#include "ppapi/c/pp_var.h"
+
+struct PP_CompletionCallback;
+
+#define PPB_FILEREF_INTERFACE_0_8 "PPB_FileRef;0.8"
+#define PPB_FILEREF_INTERFACE PPB_FILEREF_INTERFACE_0_8
+
+// A FileRef is a "weak pointer" to a file in a file system.  It contains a
+// PP_FileSystemType identifier and a file path string.
+struct PPB_FileRef {
+  // Creates a weak pointer to a file in the given filesystem. File paths are
+  // POSIX style.  Returns 0 if the path is malformed.
+  PP_Resource (*Create)(PP_Resource file_system, const char* path);
+
+  // Returns PP_TRUE if the given resource is a FileRef. Returns PP_FALSE if the
+  // resource is invalid or some type other than a FileRef.
+  PP_Bool (*IsFileRef)(PP_Resource resource);
+
+  // Returns the file system identifier of this file, or
+  // PP_FILESYSTEMTYPE_INVALID if the file ref is invalid.
+  PP_FileSystemType (*GetFileSystemType)(PP_Resource file_ref);
+
+  // Returns the name of the file. The value returned by this function does not
+  // include any path component (such as the name of the parent directory, for
+  // example). It is just the name of the file. To get the full file path, use
+  // the GetPath() function.
+  struct PP_Var (*GetName)(PP_Resource file_ref);
+
+  // Returns the absolute path of the file.  This method fails if the file
+  // system type is PP_FileSystemType_External.
+  struct PP_Var (*GetPath)(PP_Resource file_ref);
+
+  // Returns the parent directory of this file.  If file_ref points to the root
+  // of the filesystem, then the root is returned.  This method fails if the
+  // file system type is PP_FileSystemType_External.
+  PP_Resource (*GetParent)(PP_Resource file_ref);
+
+  // Makes a new directory in the filesystem as well as any parent directories
+  // if the make_ancestors parameter is PP_TRUE.  It is not valid to make a
+  // directory in the external filesystem.  Fails if the directory already
+  // exists or if ancestor directories do not exist and make_ancestors was not
+  // passed as PP_TRUE.
+  int32_t (*MakeDirectory)(PP_Resource directory_ref,
+                           PP_Bool make_ancestors,
+                           struct PP_CompletionCallback callback);
+
+  // Updates timestamps for a file.  You must have write access to the file if
+  // it exists in the external filesystem.
+  int32_t (*Touch)(PP_Resource file_ref,
+                   PP_Time last_access_time,
+                   PP_Time last_modified_time,
+                   struct PP_CompletionCallback callback);
+
+  // Delete a file or directory.  If file_ref refers to a directory, then the
+  // directory must be empty.  It is an error to delete a file or directory
+  // that is in use.  It is not valid to delete a file in the external
+  // filesystem.
+  int32_t (*Delete)(PP_Resource file_ref,
+                    struct PP_CompletionCallback callback);
+
+  // Rename a file or directory.  file_ref and new_file_ref must both refer to
+  // files in the same filesystem.  It is an error to rename a file or
+  // directory that is in use.  It is not valid to rename a file in the
+  // external filesystem.
+  int32_t (*Rename)(PP_Resource file_ref,
+                    PP_Resource new_file_ref,
+                    struct PP_CompletionCallback callback);
+};
+
+#endif  /* PPAPI_C_PPB_FILE_REF_H_ */