Fixed spelling errors and changed all references to PP_Resource to be the

ppapi/api/ppb_file_system.idl

 /* 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.
  */
 
 /**
  * This file defines the API to create a file system associated with a file.
  */
 
 label Chrome {
   M14 = 1.0
 };
 
 /**
  * The <code>PPB_FileSystem</code> struct identifies the file system type
  * associated with a file.
  */
 interface PPB_FileSystem {
   /** Create() creates a file system object of the given type.
    *
-   * @param[in] instance A <code>PP_Instance</code> indentifying the instance
+   * @param[in] instance A <code>PP_Instance</code> identifying the instance
    * with the file.
    * @param[in] type A file system type as defined by
    * <code>PP_FileSystemType</code> enum.
    *
    * @return A <code>PP_Resource</code> corresponding to a file system if
    * successful.
    */
   PP_Resource Create([in] PP_Instance instance, [in] PP_FileSystemType type);
 
   /**
@@ skipping 34 matching lines @@
    * system.
    *
    * @return A <code>PP_FileSystemType</code> with the file system type if
    * valid or <code>PP_FILESYSTEMTYPE_INVALID</code> if the provided resource
    * is not a valid file system. It is valid to call this function even before
    * Open() completes.
    */
   PP_FileSystemType GetType([in] PP_Resource file_system);
 };