pp::FileSystem: add copy constrctor

ppapi/cpp/file_io.h

 // 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.
 
 #ifndef PPAPI_CPP_FILE_IO_H_
 #define PPAPI_CPP_FILE_IO_H_
 
 #include "ppapi/c/pp_time.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/resource.h"
@@ skipping 17 matching lines @@
 
   /// A constructor used to create a <code>FileIO</code> and associate it with
   /// the provided <code>Instance</code>.
   ///
   /// @param[in] instance The instance with which this resource will be
   /// associated.
   explicit FileIO(const InstanceHandle& instance);
 
   /// The copy constructor for <code>FileIO</code>.
   ///
-  /// @param[in] other A pointer to a <code>FileIO</code>.
+  /// @param[in] other A reference to a <code>FileIO</code>.
   FileIO(const FileIO& other);
 
   /// Open() opens the specified regular file for I/O according to the given
   /// open flags, which is a bit-mask of the PP_FileOpenFlags values.  Upon
   /// success, the corresponding file is classified as "in use" by this FileIO
   /// object until such time as the FileIO object is closed or destroyed.
   ///
   /// @param[in] file_ref A <code>PP_Resource</code> corresponding to a file
   /// reference.
   ///
@@ skipping 185 matching lines @@
   // interface in 1.1.
   //
   // This takes a heap-allocated CallbackData1_0 struct passed as the user data
   // and deletes it when the call completes.
   static void CallbackConverter(void* user_data, int32_t result);
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_FILE_IO_H_