Refactor the URLResponseInfo to use new design

ppapi/api/ppb_file_io.idl

 /* Copyright (c) 2012 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 i/o object.
  */
 
@@ skipping 125 matching lines @@
    * PP_ERROR_INPROGRESS will be returned if there is another operation pending.
    */
   int32_t Touch([in] PP_Resource file_io,
                 [in] PP_Time last_access_time,
                 [in] PP_Time last_modified_time,
                 [in] PP_CompletionCallback callback);
 
   /**
    * Read() reads from an offset in the file.  The size of the buffer must be
    * large enough to hold the specified number of bytes to read.  This function
-   * might perform a partial read.
+   * might perform a partial read, meaning all the requested bytes
+   * might not be returned, even if the end of the file has not been reached.
    *
    * @param[in] file_io A <code>PP_Resource</code> corresponding to a file
    * FileIO.
    * @param[in] offset The offset into the file.
    * @param[in] buffer The buffer to hold the specified number of bytes read.
    * @param[in] bytes_to_read The number of bytes to read from
    * <code>offset</code>.
    * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
    * completion of Read().
    *
@@ skipping 78 matching lines @@
    * <strong>Note:</strong> If the FileIO object is destroyed, and it is still
    * open, then it will be implicitly closed, so you are not required to call
    * Close().
    *
    * @param[in] file_io A <code>PP_Resource</code> corresponding to a file
    * FileIO.
    */
   void Close([in] PP_Resource file_io);
 };