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

chrome/browser/net/sqlite_server_bound_cert_store.cc

Index: chrome/browser/net/sqlite_server_bound_cert_store.cc
diff --git a/chrome/browser/net/sqlite_server_bound_cert_store.cc b/chrome/browser/net/sqlite_server_bound_cert_store.cc
index 698ace0c033e3670ec7582b1361a49921223c916..cf2bca585d11c5472f2de2c782f5483561ff6066 100644
--- a/chrome/browser/net/sqlite_server_bound_cert_store.cc
+++ b/chrome/browser/net/sqlite_server_bound_cert_store.cc
@@ -40,12 +40,10 @@ class SQLiteServerBoundCertStore::Backend
   Backend(const base::FilePath& path,
           quota::SpecialStoragePolicy* special_storage_policy)
       : path_(path),
-        db_(NULL),
         num_pending_(0),
         force_keep_session_state_(false),
         special_storage_policy_(special_storage_policy),
-        corruption_detected_(false) {
-  }
+        corruption_detected_(false) {}
 
   // Creates or loads the SQLite database.
   void Load(const LoadedCallback& loaded_callback);