Pepper/Flapper: Get rid of unimplemented private file ref stuff and implement proxy.

ppapi/c/private/ppb_flash_file.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_C_PRIVATE_PPB_FLASH_FILE_H_
 #define PPAPI_C_PRIVATE_PPB_FLASH_FILE_H_
 
 #ifdef _WIN32
 #include <windows.h>
 #endif
@@ skipping 70 matching lines @@
                             const char* path,
                             struct PP_DirContents_Dev** contents);
 
   // Frees the data allocated by GetDirContents.
   void (*FreeDirContents)(PP_Instance instance,
                           struct PP_DirContents_Dev* contents);
 };
 
 // PPB_Flash_File_FileRef ------------------------------------------------------
 
-#define PPB_FLASH_FILE_FILEREF_INTERFACE "PPB_Flash_File_FileRef;1"
+#define PPB_FLASH_FILE_FILEREF_INTERFACE "PPB_Flash_File_FileRef;2"
 
 // This interface provides (for Flash) synchronous access to files whose paths
 // are given by a Pepper FileRef. Such FileRefs are typically obtained via the
 // Pepper file chooser.
 struct PPB_Flash_File_FileRef {
-  // The functions below correspond exactly to the ones in the module-local file
-  // interface (except in taking FileRefs instead of paths, of course).
+  // The functions below correspond exactly to their module-local counterparts
+  // (except in taking FileRefs instead of paths, of course). We omit the
+  // functionality which we do not provide for FileRefs.
   int32_t (*OpenFile)(PP_Resource file_ref_id,
                       int32_t mode,
                       PP_FileHandle* file);
-  int32_t (*RenameFile)(PP_Resource from_file_ref_id,
-                        PP_Resource to_file_ref_id);
-  int32_t (*DeleteFileOrDir)(PP_Resource file_ref_id,
-                             PP_Bool recursive);
-  int32_t (*CreateDir)(PP_Resource file_ref_id);
   int32_t (*QueryFile)(PP_Resource file_ref_id,
                        struct PP_FileInfo_Dev* info);
-  int32_t (*GetDirContents)(PP_Resource file_ref_id,
-                            struct PP_DirContents_Dev** contents);
-  void (*FreeDirContents)(PP_Instance instance,
-                          struct PP_DirContents_Dev* contents);
 };
 
 #endif  // PPAPI_C_PRIVATE_PPB_FLASH_FILE_H_