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

content/browser/download/download_file_unittest.cc

Index: content/browser/download/download_file_unittest.cc
diff --git a/content/browser/download/download_file_unittest.cc b/content/browser/download/download_file_unittest.cc
index f92bb02e43f0f43ce8cc382f0766ca24888cdd8f..604baa4ea090ce7cadd1c8d43b5cfacaaa942a73 100644
--- a/content/browser/download/download_file_unittest.cc
+++ b/content/browser/download/download_file_unittest.cc
@@ -131,16 +131,15 @@ class DownloadFileTest : public testing::Test {
 
     scoped_ptr<DownloadSaveInfo> save_info(new DownloadSaveInfo());
     download_file_.reset(
-        new DownloadFileImpl(
-            save_info.Pass(),
-            base::FilePath(),
-            GURL(),                     // Source
-            GURL(),                     // Referrer
-            calculate_hash,
-            scoped_ptr<ByteStreamReader>(input_stream_),
-            net::BoundNetLog(),
-            scoped_ptr<PowerSaveBlocker>(NULL).Pass(),
-            observer_factory_.GetWeakPtr()));
+        new DownloadFileImpl(save_info.Pass(),
+                             base::FilePath(),
+                             GURL(),  // Source
+                             GURL(),  // Referrer
+                             calculate_hash,
+                             scoped_ptr<ByteStreamReader>(input_stream_),
+                             net::BoundNetLog(),
+                             scoped_ptr<PowerSaveBlocker>().Pass(),
+                             observer_factory_.GetWeakPtr()));
 
     EXPECT_CALL(*input_stream_, Read(_, _))
         .WillOnce(Return(ByteStreamReader::STREAM_EMPTY))