Convert Pass()→std::move() for Mac build.

chrome/browser/ui/cocoa/extensions/extension_install_prompt_test_utils.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/extensions/extension_install_prompt_test_utils.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/path_service.h"
@@ skipping 52 matching lines @@
       file_contents.length());
 }
 
 scoped_ptr<ExtensionInstallPrompt::Prompt> BuildExtensionInstallPrompt(
     Extension* extension) {
   scoped_ptr<ExtensionInstallPrompt::Prompt> prompt(
       new ExtensionInstallPrompt::Prompt(
           ExtensionInstallPrompt::INSTALL_PROMPT));
   prompt->set_extension(extension);
   prompt->set_icon(LoadInstallPromptIcon());
-  return prompt.Pass();
+  return prompt;
 }
 
 scoped_ptr<ExtensionInstallPrompt::Prompt>
 BuildExtensionPostInstallPermissionsPrompt(Extension* extension) {
   scoped_ptr<ExtensionInstallPrompt::Prompt> prompt(
       new ExtensionInstallPrompt::Prompt(
           ExtensionInstallPrompt::POST_INSTALL_PERMISSIONS_PROMPT));
   prompt->set_extension(extension);
   prompt->set_icon(LoadInstallPromptIcon());
-  return prompt.Pass();
+  return prompt;
 }
 
 }  // namespace chrome