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

chrome/browser/chromeos/extensions/external_cache.cc

 // Copyright (c) 2013 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/chromeos/extensions/external_cache.h"
 
 #include <stddef.h>
+#include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "base/values.h"
@@ skipping 45 matching lines @@
 
 ExternalCache::~ExternalCache() {
 }
 
 void ExternalCache::Shutdown(const base::Closure& callback) {
   local_cache_.Shutdown(callback);
 }
 
 void ExternalCache::UpdateExtensionsList(
     scoped_ptr<base::DictionaryValue> prefs) {
-  extensions_ = prefs.Pass();
+  extensions_ = std::move(prefs);
 
   if (extensions_->empty()) {
     // If list of know extensions is empty, don't init cache on disk. It is
     // important shortcut for test to don't wait forever for cache dir
     // initialization that should happen outside of Chrome on real device.
     cached_extensions_->Clear();
     UpdateExtensionLoader();
     return;
   }
 
@@ skipping 279 matching lines @@
   OnPutExtension(id, file_path, file_ownership_passed);
   callback.Run(id, !file_ownership_passed);
 }
 
 std::string ExternalCache::Delegate::GetInstalledExtensionVersion(
     const std::string& id) {
   return std::string();
 }
 
 }  // namespace chromeos