Remove implicit conversions from scoped_refptr to T* in chrome/browser/extensions/

chrome/browser/extensions/blacklist.cc

 // Copyright 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/extensions/blacklist.h"
 
 #include <algorithm>
 #include <iterator>
 
 #include "base/bind.h"
@@ skipping 142 matching lines @@
   SetDatabaseManager(database_manager);
 }
 
 Blacklist::ScopedDatabaseManagerForTest::~ScopedDatabaseManagerForTest() {
   SetDatabaseManager(original_);
 }
 
 Blacklist::Blacklist(ExtensionPrefs* prefs) {
   scoped_refptr<SafeBrowsingDatabaseManager> database_manager =
       g_database_manager.Get().get();
-  if (database_manager) {
+  if (database_manager.get()) {
     registrar_.Add(
         this,
         chrome::NOTIFICATION_SAFE_BROWSING_UPDATE_COMPLETE,
         content::Source<SafeBrowsingDatabaseManager>(database_manager.get()));
   }
 
   // Clear out the old prefs-backed blacklist, stored as empty extension entries
   // with just a "blacklisted" property.
   //
   // TODO(kalman): Delete this block of code, see http://crbug.com/295882.
@@ skipping 169 matching lines @@
 }
 
 void Blacklist::Observe(int type,
                         const content::NotificationSource& source,
                         const content::NotificationDetails& details) {
   DCHECK_EQ(chrome::NOTIFICATION_SAFE_BROWSING_UPDATE_COMPLETE, type);
   FOR_EACH_OBSERVER(Observer, observers_, OnBlacklistUpdated());
 }
 
 }  // namespace extensions