PPAPI: Move PPB_DirectoryReader_Dev to stable (won't commit)

ppapi/cpp/dev/directory_reader_dev.h

-// 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_DEV_DIRECTORY_READER_DEV_H_
-#define PPAPI_CPP_DEV_DIRECTORY_READER_DEV_H_
-
-#include <vector>
-
-#include "ppapi/c/dev/ppb_directory_reader_dev.h"
-#include "ppapi/cpp/resource.h"
-
-namespace pp {
-
-class DirectoryEntry_Dev;
-class FileRef;
-template<typename T> class CompletionCallbackWithOutput;
-
-class DirectoryReader_Dev : public Resource {
- public:
-  /// A constructor that creates a DirectoryReader resource for the given
-  /// directory.
-  ///
-  /// @param[in] directory_ref A <code>PP_Resource</code> corresponding to the
-  /// directory reference to be read.
-  explicit DirectoryReader_Dev(const FileRef& directory_ref);
-
-  DirectoryReader_Dev(const DirectoryReader_Dev& other);
-
-  /// ReadEntries() Reads all entries in the directory.
-  ///
-  /// @param[in] cc A <code>CompletionCallbackWithOutput</code> to be called
-  /// upon completion of ReadEntries(). On success, the directory entries will
-  /// be passed to the given function.
-  ///
-  /// Normally you would use a CompletionCallbackFactory to allow callbacks to
-  /// be bound to your class. See completion_callback_factory.h for more
-  /// discussion on how to use this. Your callback will generally look like:
-  ///
-  /// @code
-  ///   void OnReadEntries(int32_t result,
-  ///                      const std::vector<DirectoryEntry_Dev>& entries) {
-  ///     if (result == PP_OK)
-  ///       // use entries...
-  ///   }
-  /// @endcode
-  ///
-  /// @return An int32_t containing an error code from <code>pp_errors.h</code>.
-  int32_t ReadEntries(
-      const CompletionCallbackWithOutput< std::vector<DirectoryEntry_Dev> >&
-          callback);
-};
-
-}  // namespace pp
-
-#endif  // PPAPI_CPP_DIRECTORY_READER_H_