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

chrome/browser/profiles/profile_impl_io_data.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/profiles/profile_impl_io_data.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
@@ skipping 481 matching lines @@
   scoped_ptr<net::URLRequestJobFactoryImpl> extensions_job_factory(
       new net::URLRequestJobFactoryImpl());
   // TODO(shalev): The extensions_job_factory has a NULL NetworkDelegate.
   // Without a network_delegate, this protocol handler will never
   // handle file: requests, but as a side effect it makes
   // job_factory::IsHandledProtocol return true, which prevents attempts to
   // handle the protocol externally. We pass NULL in to
   // SetUpJobFactory() to get this effect.
   extensions_job_factory_ = SetUpJobFactoryDefaults(
       extensions_job_factory.Pass(),
-      scoped_ptr<ProtocolHandlerRegistry::JobInterceptorFactory>(NULL),
+      scoped_ptr<ProtocolHandlerRegistry::JobInterceptorFactory>(),
       NULL,
       ftp_factory_.get());
   extensions_context->set_job_factory(extensions_job_factory_.get());
 }
 
 ChromeURLRequestContext*
 ProfileImplIOData::InitializeAppRequestContext(
     ChromeURLRequestContext* main_context,
     const StoragePartitionDescriptor& partition_descriptor,
     scoped_ptr<ProtocolHandlerRegistry::JobInterceptorFactory>
@@ skipping 180 matching lines @@
     const base::Closure& completion) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK(initialized());
 
   DCHECK(transport_security_state());
   // Completes synchronously.
   transport_security_state()->DeleteAllDynamicDataSince(time);
   DCHECK(http_server_properties_manager_);
   http_server_properties_manager_->Clear(completion);
 }