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

ios/chrome/browser/favicon/large_icon_cache.cc

 // Copyright 2015 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 "ios/chrome/browser/favicon/large_icon_cache.h"
 
 #include "components/favicon_base/fallback_icon_style.h"
 #include "components/favicon_base/favicon_types.h"
 #include "url/gurl.h"
 
@@ skipping 36 matching lines @@
 scoped_ptr<favicon_base::LargeIconResult> LargeIconCache::CloneLargeIconResult(
     const favicon_base::LargeIconResult& large_icon_result) {
   scoped_ptr<favicon_base::LargeIconResult> clone;
   if (large_icon_result.bitmap.is_valid()) {
     clone.reset(new favicon_base::LargeIconResult(large_icon_result.bitmap));
   } else {
     clone.reset(
         new favicon_base::LargeIconResult(new favicon_base::FallbackIconStyle(
             *large_icon_result.fallback_icon_style.get())));
   }
-  return clone.Pass();
+  return clone;
 }