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

content/browser/download/drag_download_file_browsertest.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 "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "content/browser/download/download_file_factory.h"
 #include "content/browser/download/download_file_impl.h"
 #include "content/browser/download/download_item_impl.h"
 #include "content/browser/download/download_manager_impl.h"
@@ skipping 76 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(DragDownloadFileTest);
 };
 
 IN_PROC_BROWSER_TEST_F(DragDownloadFileTest, DragDownloadFileTest_NetError) {
   base::FilePath name(downloads_directory().AppendASCII(
       "DragDownloadFileTest_NetError.txt"));
   GURL url(URLRequestMockHTTPJob::GetMockUrl(base::FilePath(FILE_PATH_LITERAL(
       "download-test.lib"))));
   Referrer referrer;
   std::string referrer_encoding;
-  DragDownloadFile* file = new DragDownloadFile(
-      name, scoped_ptr<net::FileStream>(NULL), url, referrer,
-      referrer_encoding, shell()->web_contents());
+  DragDownloadFile* file = new DragDownloadFile(name,
+                                                scoped_ptr<net::FileStream>(),
+                                                url,
+                                                referrer,
+                                                referrer_encoding,
+                                                shell()->web_contents());
   scoped_refptr<MockDownloadFileObserver> observer(
       new MockDownloadFileObserver());
   EXPECT_CALL(*observer.get(), OnDownloadAborted())
       .WillOnce(InvokeWithoutArgs(this, &DragDownloadFileTest::Succeed));
   ON_CALL(*observer.get(), OnDownloadCompleted(_))
       .WillByDefault(InvokeWithoutArgs(this, &DragDownloadFileTest::FailFast));
   file->Start(observer.get());
   RunMessageLoop();
 }
 
@@ skipping 15 matching lines @@
       .WillOnce(InvokeWithoutArgs(this, &DragDownloadFileTest::Succeed));
   ON_CALL(*observer.get(), OnDownloadAborted())
       .WillByDefault(InvokeWithoutArgs(this, &DragDownloadFileTest::FailFast));
   file->Start(observer.get());
   RunMessageLoop();
 }
 
 // TODO(benjhayden): Test Stop().
 
 }  // namespace content