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

components/sessions/ios/ios_serialized_navigation_builder_unittest.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 "components/sessions/ios/ios_serialized_navigation_builder.h"
 
 #include "components/sessions/core/serialized_navigation_entry.h"
 #include "components/sessions/core/serialized_navigation_entry_test_helper.h"
 #include "ios/web/public/favicon_status.h"
 #include "ios/web/public/navigation_item.h"
@@ skipping 10 matching lines @@
       web::NavigationItem::Create());
   navigation_item->SetReferrer(web::Referrer(
       test_data::kReferrerURL,
       static_cast<web::ReferrerPolicy>(test_data::kReferrerPolicy)));
   navigation_item->SetURL(test_data::kVirtualURL);
   navigation_item->SetTitle(test_data::kTitle);
   navigation_item->SetTransitionType(test_data::kTransitionType);
   navigation_item->SetTimestamp(test_data::kTimestamp);
   navigation_item->GetFavicon().valid = true;
   navigation_item->GetFavicon().url = test_data::kFaviconURL;
-  return navigation_item.Pass();
+  return navigation_item;
 }
 
 }  // namespace
 
 
 // Create a SerializedNavigationEntry from a NavigationItem.  All its fields
 // should match the NavigationItem's.
 TEST(IOSSerializedNavigationBuilderTest, FromNavigationItem) {
   const scoped_ptr<web::NavigationItem> navigation_item(
       MakeNavigationItemForTest());
@@ skipping 53 matching lines @@
             new_navigation_item->GetVirtualURL());
   EXPECT_EQ(old_navigation_item->GetTitle(),
             new_navigation_item->GetTitle());
   EXPECT_EQ(ui::PAGE_TRANSITION_RELOAD,
             new_navigation_item->GetTransitionType());
   EXPECT_EQ(old_navigation_item->GetTimestamp(),
             new_navigation_item->GetTimestamp());
 }
 
 }  // namespace sessions