Rewrite scoped_ptr<T>(NULL) to use the default ctor in chrome/.

chrome/browser/safe_browsing/database_manager.cc

 // 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.
 
 #include "chrome/browser/safe_browsing/database_manager.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 56 matching lines @@
     const std::vector<GURL>& urls,
     const std::vector<SBFullHash>& full_hashes,
     Client* client,
     safe_browsing_util::ListType check_type)
     : urls(urls),
       url_results(urls.size(), SB_THREAT_TYPE_SAFE),
       full_hashes(full_hashes),
       full_hash_results(full_hashes.size(), SB_THREAT_TYPE_SAFE),
       client(client),
       need_get_hash(false),
-      check_type(check_type),
-      timeout_factory_(NULL) {
+      check_type(check_type) {
   DCHECK_EQ(urls.empty(), !full_hashes.empty())
       << "Exactly one of urls and full_hashes must be set";
 }
 
 SafeBrowsingDatabaseManager::SafeBrowsingCheck::~SafeBrowsingCheck() {}
 
 void SafeBrowsingDatabaseManager::Client::OnSafeBrowsingResult(
     const SafeBrowsingCheck& check) {
   DCHECK_EQ(check.urls.size(), check.url_results.size());
   DCHECK_EQ(check.full_hashes.size(), check.full_hash_results.size());
@@ skipping 960 matching lines @@
       new base::WeakPtrFactory<SafeBrowsingDatabaseManager>(this));
   checks_.insert(check);
 
   safe_browsing_thread_->message_loop()->PostTask(FROM_HERE, task);
 
   base::MessageLoop::current()->PostDelayedTask(FROM_HERE,
       base::Bind(&SafeBrowsingDatabaseManager::TimeoutCallback,
                  check->timeout_factory_->GetWeakPtr(), check),
       check_timeout_);
 }