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

ppapi/ppapi_sources.gypi

Index: ppapi/ppapi_sources.gypi
diff --git a/ppapi/ppapi_sources.gypi b/ppapi/ppapi_sources.gypi
index 016bcb48b37708068ec79a5142afebc032c06d43..967281947e6ccc4b2ca4cf53bf848c82cfefb0f8 100644
--- a/ppapi/ppapi_sources.gypi
+++ b/ppapi/ppapi_sources.gypi
@@ -27,6 +27,7 @@
       'c/ppb_audio_config.h',
       'c/ppb_console.h',
       'c/ppb_core.h',
+      'c/ppb_directory_reader.h',
       'c/ppb_file_io.h',
       'c/ppb_file_ref.h',
       'c/ppb_file_system.h',
@@ -64,7 +65,6 @@
       'c/dev/ppb_char_set_dev.h',
       'c/dev/ppb_cursor_control_dev.h',
       'c/dev/ppb_device_ref_dev.h',
-      'c/dev/ppb_directory_reader_dev.h',
       'c/dev/ppb_file_chooser_dev.h',
       'c/dev/ppb_find_dev.h',
       'c/dev/ppb_font_dev.h',
@@ -150,6 +150,10 @@
       'cpp/completion_callback.h',
       'cpp/core.cc',
       'cpp/core.h',
+      'cpp/directory_entry.cc',
+      'cpp/directory_entry.h',
+      'cpp/directory_reader.cc',
+      'cpp/directory_reader.h',
       'cpp/file_io.cc',
       'cpp/file_io.h',
       'cpp/file_ref.cc',
@@ -222,10 +226,6 @@
       'cpp/dev/cursor_control_dev.h',
       'cpp/dev/device_ref_dev.cc',
       'cpp/dev/device_ref_dev.h',
-      'cpp/dev/directory_entry_dev.cc',
-      'cpp/dev/directory_entry_dev.h',
-      'cpp/dev/directory_reader_dev.cc',
-      'cpp/dev/directory_reader_dev.h',
       'cpp/dev/file_chooser_dev.cc',
       'cpp/dev/file_chooser_dev.h',
       'cpp/dev/find_dev.cc',