Fixed capitalization of error codes.

ppapi/api/ppb_file_io.idl

Index: ppapi/api/ppb_file_io.idl
===================================================================
--- ppapi/api/ppb_file_io.idl	(revision 118900)
+++ ppapi/api/ppb_file_io.idl	(working copy)
@@ -154,7 +154,7 @@
    * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
    * completion of Read().
    *
-   * @return An The number of bytes read an error code from
+   * @return An number of bytes read an error code from
    * <code>pp_errors.h</code>. If the return value is 0, then end-of-file was
    * reached. It is valid to call Read() multiple times with a completion
    * callback to queue up parallel reads from the file, but pending reads
@@ -179,7 +179,7 @@
    * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
    * completion of Write().
    *
-   * @return An The number of bytes written or an error code from
+   * @return The number of bytes written or an error code from
    * <code>pp_errors.h</code>. If the return value is 0, then end-of-file was
    * reached. It is valid to call Write() multiple times with a completion
    * callback to queue up parallel writes to the file, but pending writes