Convert Pass()→std::move() for CrOS extension code.

chrome/browser/extensions/api/braille_display_private/brlapi_keycode_map.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/extensions/api/braille_display_private/brlapi_keycode_map.h"
 
 #include <stdint.h>
 
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversion_utils.h"
@@ skipping 147 matching lines @@
   switch (code & BRLAPI_KEY_TYPE_MASK) {
     case BRLAPI_KEY_TYPE_SYM:
       MapKeySym(code, result.get());
       break;
     case BRLAPI_KEY_TYPE_CMD:
       MapCommand(code, result.get());
       break;
   }
   if (result->command == KEY_COMMAND_NONE)
     result.reset();
-  return result.Pass();
+  return result;
 }
 
 }  // namespace braille_display_private
 }  // namespace api
 }  // namespace extensions