Fixed capitalization of error codes.

ppapi/cpp/file_io.h

Index: ppapi/cpp/file_io.h
===================================================================
--- ppapi/cpp/file_io.h	(revision 118900)
+++ ppapi/cpp/file_io.h	(working copy)
@@ -93,7 +93,7 @@
   /// @param[in] cc A <code>CompletionCallback</code> to be called upon
   /// completion of Read().
   ///
-  /// @return An The number of bytes read an error code from
+  /// @return The 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 at different offsets.
@@ -112,7 +112,7 @@
   /// @param[in] cc A <code>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 at different offsets.