Call scoped_refptr<T>::get() rather than relying on implicit "operator T*"

chrome/browser/background/background_contents_service.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/background/background_contents_service.h"
 
 #include "apps/app_load_service.h"
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 499 matching lines @@
                          frame_name,
                          UTF8ToUTF16(extension_id));
 }
 
 void BackgroundContentsService::LoadBackgroundContentsFromManifests(
     Profile* profile) {
   const ExtensionSet* extensions = extensions::ExtensionSystem::Get(profile)->
       extension_service()->extensions();
   ExtensionSet::const_iterator iter = extensions->begin();
   for (; iter != extensions->end(); ++iter) {
-    const Extension* extension = *iter;
+    const Extension* extension = iter->get();
     if (extension->is_hosted_app() &&
         BackgroundInfo::HasBackgroundPage(extension)) {
       LoadBackgroundContents(profile,
                              BackgroundInfo::GetBackgroundURL(extension),
                              ASCIIToUTF16("background"),
                              UTF8ToUTF16(extension->id()));
     }
   }
 }
 
@@ skipping 150 matching lines @@
     bool user_gesture,
     bool* was_blocked) {
   Browser* browser = chrome::FindLastActiveWithProfile(
       Profile::FromBrowserContext(new_contents->GetBrowserContext()),
       chrome::GetActiveDesktop());
   if (browser) {
     chrome::AddWebContents(browser, NULL, new_contents, disposition,
                            initial_pos, user_gesture, was_blocked);
   }
 }