Pepper/Flapper: Add an interface to do sync file ops on FileRefs.

ppapi/c/private/ppb_flash_file.h

Index: ppapi/c/private/ppb_flash_file.h
diff --git a/ppapi/c/private/ppb_flash_file.h b/ppapi/c/private/ppb_flash_file.h
index 8e1f29109a64e7a2efce4a5abf3b6e74f09a7d2e..9e2def9c9914ec5183a8281eae0fd12023017a1a 100644
--- a/ppapi/c/private/ppb_flash_file.h
+++ b/ppapi/c/private/ppb_flash_file.h
@@ -38,45 +38,45 @@ struct PP_DirContents_Dev {
 
 #define PPB_FLASH_FILE_MODULELOCAL_INTERFACE "PPB_Flash_File_ModuleLocal;1"
 
+// This interface provides (for Flash) synchronous access to module-local files.
+// Module-local file paths are '/'-separated UTF-8 strings, relative to a
+// module-specific root.
 struct PPB_Flash_File_ModuleLocal {
-  // Opens a module-local file, returning a file descriptor (posix) or a HANDLE
-  // (win32) into file. Module-local file paths (here and below) are
-  // '/'-separated UTF-8 strings, relative to a module-specific root. The return
-  // value is the ppapi error, PP_OK if success, one of the PP_ERROR_* in case
-  // of failure.
+  // Opens a file, returning a file descriptor (posix) or a HANDLE (win32) into
+  // file. The return value is the ppapi error, PP_OK if success, one of the
+  // PP_ERROR_* in case of failure.
   int32_t (*OpenFile)(PP_Instance instance,
                       const char* path,
                       int32_t mode,
                       PP_FileHandle* file);
 
-  // Renames a module-local file. The return value is the ppapi error, PP_OK if
-  // success, one of the PP_ERROR_* in case of failure.
+  // Renames a file. The return value is the ppapi error, PP_OK if success, one
+  // of the PP_ERROR_* in case of failure.
   int32_t (*RenameFile)(PP_Instance instance,
                         const char* path_from,
                         const char* path_to);
 
-  // Deletes a module-local file or directory. If recursive is set and the path
-  // points to a directory, deletes all the contents of the directory. The
-  // return value is the ppapi error, PP_OK if success, one of the PP_ERROR_* in
-  // case of failure.
+  // Deletes a file or directory. If recursive is set and the path points to a
+  // directory, deletes all the contents of the directory. The return value is
+  // the ppapi error, PP_OK if success, one of the PP_ERROR_* in case of
+  // failure.
   int32_t (*DeleteFileOrDir)(PP_Instance instance,
                              const char* path,
                              PP_Bool recursive);
 
-  // Creates a module-local directory. The return value is the ppapi error,
-  // PP_OK if success, one of the PP_ERROR_* in case of failure.
+  // Creates a directory. The return value is the ppapi error, PP_OK if success,
+  // one of the PP_ERROR_* in case of failure.
   int32_t (*CreateDir)(PP_Instance instance, const char* path);
 
-  // Queries information about a module-local file. The return value is the
-  // ppapi error, PP_OK if success, one of the PP_ERROR_* in case of failure.
+  // Queries information about a file. The return value is the ppapi error,
+  // PP_OK if success, one of the PP_ERROR_* in case of failure.
   int32_t (*QueryFile)(PP_Instance instance,
                        const char* path,
                        struct PP_FileInfo_Dev* info);
 
-  // Gets the list of files contained in a module-local directory. The return
-  // value is the ppapi error, PP_OK if success, one of the PP_ERROR_* in case
-  // of failure. If non-NULL, the returned contents should be freed with
-  // FreeDirContents.
+  // Gets the list of files contained in a directory. The return value is the
+  // ppapi error, PP_OK if success, one of the PP_ERROR_* in case of failure. If
+  // non-NULL, the returned contents should be freed with FreeDirContents.
   int32_t (*GetDirContents)(PP_Instance instance,
                             const char* path,
                             struct PP_DirContents_Dev** contents);
@@ -86,4 +86,30 @@ struct PPB_Flash_File_ModuleLocal {
                           struct PP_DirContents_Dev* contents);
 };
 
+// PPB_Flash_File_FileRef ------------------------------------------------------
+
+#define PPB_FLASH_FILE_FILEREF_INTERFACE "PPB_Flash_File_FileRef;1"
+
+// 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).
+  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_